Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ae84ef7874ff94…

MALICIOUS

PDF

80.9 KB Created: 2021-09-07 12:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3e2eb66c993dcfe2a56044c0d18fa234 SHA-1: ab587eb26b5b275a9f371581b2c3753c37b5749e SHA-256: 32ae84ef7874ff94f5ee460a93d8b135a83c8e6440e1b841a14f5e324b7e253a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a malicious PDF, as indicated by ML classification and ClamAV detection. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content or phishing pages. The PDF structure and embedded URLs are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://laborke.ru/uplcv?utm_term=buku+agama+islam+kelas+10+erlangga+pdf PDF link annotation
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/485c8657a0efbb906c58dd1ecbd31afa/93354129304.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/pufuj.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/21232713680.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3846a8dd5---66084506922.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/gejenizifibepu.pdfIn PDF document text
    • http://bienbao.org/uploads/files/ziseromubezadegekafalalux.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/81388650420.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/65757928f7a8303d20234ffacaacaf98/60757685476.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/50009993005.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/48375134508.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/34986606989.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/lasug.pdfIn PDF document text
    • http://thedreams.cz/files/sofevakexekudaloxu.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/c08u4pknoju7kkdhh209qtblb5/gilalokodos.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/61837462330.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/5d1fb30b88da1dbe73f4ef494aab2bb4/45652618667.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/0bpkepmmljlc022s3qf5leba48/9419344674.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8e4dec090---biwegixukunirepakozenox.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1c98b1aee3---vuzawonajikagar.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160abe7408279d---logexuvawikosalikonifowe.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/sodolopufogi.pdfIn PDF document text
    • http://basar-hemeringen.de/ablage/userfiles/files/7540547292.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/turovurelamolufewukipif.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f3c808fab1dded6f133050438834de9c/72795793375.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/bonumugadiwojuxadob.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/dotavemaponilinululido.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_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 16348 bytes
SHA-256: c29e04ee4275da7508cd240cc9f475f8e3c4eebbbaba15d92c9b783467289e11
font_01_sfnt_off000103cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE3 11040 bytes
SHA-256: 289678a02597a51eb8c8a4b3ca514bcf77c41fcd22fc04d46cc4fb675a10ce8f

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