Malicious PDF — malware analysis report

Static analysis result for SHA-256 95768c21e301ea04…

MALICIOUS

PDF

100.2 KB Created: 2021-06-29 00:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: a762efba649591e57fe557ec3f1263d8 SHA-1: 7c04c7a2506e40d69af1b38ad28cb2ffb5a26d3f SHA-256: 95768c21e301ea0478ff98a78f11a54c7c7e5faf9e84cf4e3fe0e05357e5c39e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristic firings suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9818

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://smidgel.ru/uplcv?utm_term=may+god+soul+rest+in+peace PDF link annotation
    • http://industrialdevices.in/uploads/vivabiwofimagafe.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1os31fc20cs1kgb1tho66kl7n1/92491605140.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882eeb77713---degepumifetigezena.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9d1c83e72---45197145808.pdfPDF link annotation
    • http://daycamhoa.net/upload/UploadFiles/files/mixokitebun.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/57935931241.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a49f47ed40f---78887014055.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b5391f25f---kamudasazedowidumo.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/32539897967.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eec59c562e---96222873667.pdfIn PDF document text
    • http://stevis.cz/files/file/gadunovilekinijoka.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d51fc828c---21795664401.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608c06e2bae78---nixuxifaxi.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d64b1ce63---sunikojajevufona.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/75420329ca742f5640ff006f2c4f94b4/dodofolekuxinijetimemo.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64f1cef20e---juzomidutijaxilamexod.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/64466297433.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/vegofufivu.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080f1ca02ba5---ritujizikuzewimapid.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/sefanekijoditoxizefuk.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/vijafokeragijalib.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mv3dtgo89hvmtfbn6e9grb6ii0/lojoruvawip.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607127f5cc533---52361039779.pdfIn PDF document text
    • http://wajl.net/img/file/2021619104356.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/dezonufavojamanisida.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/gilojomikav.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c68c86d97b6---savugafedad.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/oqcfjifjjgtoc4l54crnqumr92/62634446825.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f2cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF2CD 26952 bytes
SHA-256: f4ec399a1fb282a081bf37086f7a1eca87859b89092f12530ee2b6f1e15b2b3b
font_01_sfnt_off00012372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12372 10896 bytes
SHA-256: 535f2645175f17758b2de7ca5e165aee87e100556b66698588b7140b99fbb514
font_02_sfnt_off00013c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9C 18220 bytes
SHA-256: 2c99f1d6b64601f38bdbb3865e9ffbdec8035edbdfa5def692c2360cda2fc246
font_03_sfnt_off00016af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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