Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed3a5b200d0cc0e…

MALICIOUS

PDF

89.9 KB Created: 2021-08-13 05:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7d6bdd124597e0d9f486525811d3b50c SHA-1: 58cd5a2d7a6d6e0392ce6e741ff7f67e29b7807b SHA-256: eed3a5b200d0cc0eb08d5d98e4aa993b0c1e0692ec815b5081e798ef81da0890
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://drafthe.ru/uplcv?utm_term=what%27s+app+status+video+app PDF link annotation
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/6018626975.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/31435092422.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/55f28f3fcabb8dd903b0d13f6d4b1cb0/kulipapuxafugoza.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/78348055904.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/83809665173.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/33495764649.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/e34eb96b1b743e30270208851b1e12c0/vuwerigusa.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79ec10f11c---nefisuwi.pdfIn PDF document text
    • http://join-angel.com/ckfinder/userfiles/files/33535330440.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/rexopotu.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/38908388040.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/bivijoxokawu.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9b5a32709---dufivezidoj.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/tosegesejopipulidenukeg.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/zosadifinubawesovonidal.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/uovj27nsneo0e544jdif2t7am4/7402071162.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/170802315624.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/1691b3a7f0877758f91f2fa93afb198d/kozafinomofezisoriguwepe.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070fb130b224---69955735496.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/86805143106.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/gobelu.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a40629af4e8---21767629790.pdfIn PDF document text
    • http://anpo.vn/upload/files/40591378332.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/60336032672.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_off0000fbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB3 17436 bytes
SHA-256: 903331f2bebc73477791cc9895ba9887afc13cfc424da85d15c31d9cf34b26c2
font_01_sfnt_off0001297c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297C 10432 bytes
SHA-256: b692e89b238d67eeede7349f2dd9c962934805de807dfb0a5afbb56f530801f8
font_02_sfnt_off00014160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14160 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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