Malicious PDF — malware analysis report

Static analysis result for SHA-256 62784c52f660499b…

MALICIOUS

PDF

82.1 KB Created: 2021-09-04 14:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d5bee265e595046f9466eb10b5cba754 SHA-1: 37ab2269daaeb3d5daf0af5dea335b4ff6a95330 SHA-256: 62784c52f660499b39a92b4a55996cccf7c1cf54a6bd17ad0237268f45f21006
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites, which in turn host other PDF files. This behavior is indicative of a phishing or malware distribution campaign, likely initiated via spearphishing. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wastran.ru/uplcv?utm_term=in+jesus+name+lyrics+and+chords+pdf PDF link annotation
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16112db146f99e---fazukon.pdfIn PDF document text
    • https://kawanmto.net/contents//files/zobejonuduzufano.pdfIn PDF document text
    • https://webmenuplus.com/images/file/37812540675.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/fibuwevazeveb.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/sabelumibuxemukifipebumal.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/woligodutixadirepe.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9cd6123f7---ratat.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611531cc27f75---davewez.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/zarubewapitusi.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/tofanugopofewipotog.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/65ne6rgk050sa7rndv877nhr4g/54290925922.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/pofofalufokixaxixosijivo.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/68928297213.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/p97vqp73bovbf15dsij00q0jlp/28140235450.pdfIn PDF document text
    • http://ekomeg.pl/Upload/file/96215119054.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/seleji.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/f271e9991854a841459866251e465d47/benibaviliforitowolipef.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c93849c7188---jevupevuxesugamolu.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/551b0ae567b1ab6db59b86725e99e71e/rodezanubojukula.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/texajatekova.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/28239409049.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/gapegiladebuzevuxijumaw.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/pebimemuwugatide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BD 11084 bytes
SHA-256: 66bb4cd52b48a8241b1ea875b61b795b9aa76cc5d6f0b7b79dc2201df320eadf
font_01_sfnt_off0000f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 18108 bytes
SHA-256: 675f418f31a02592a45885a0a1e8e1d551717f1cea6277192e2621a38ea5d217
font_02_sfnt_off00012285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12285 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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