Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d63c77f06fb675…

MALICIOUS

PDF

84.9 KB Created: 2021-09-12 05:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b9bcde80108e3c254a0a61415ae463fb SHA-1: 84c3addf0d7c116a2e1103f3018aab6be00d471e SHA-256: 39d63c77f06fb67595264f1b715f5698ea435d3ab925436de22132b184e3fe52
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it impersonates Netflix and contains a call-to-action link. While the primary link is to a benign Google feed, it redirects to a suspicious domain, suggesting a credential phishing attempt. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=call+of+duty+cracked+apk.
  • 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 http://indecomavo.pl/userimg/inc/neganorejebokuzofarali.pdf In PDF document text
    • http://banglenhospital.com/UserFiles/File/sijibosikelodupu.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/75108455924.pdfIn PDF document text
    • http://saaretravel.ee/images/file/62991710805.pdfIn PDF document text
    • https://coevent.ru/upload/files/mikinufokidamavapewutegi.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/kidexagetikake.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/fafejuferanu.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/lijajadisavineru.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/rozapuritetomuboz.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/ae0ec4b4bfb14baba4cff89c295b4d37/vubemipukopiliwevokado.pdfIn PDF document text
    • http://abbeloosschinkels.be/userfiles/file/nuzogefixemuzutiginuxebem.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109040836071024.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/67212896497.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/72281060715.pdfIn PDF document text
    • http://topbuild.net/content/xuploadimages/file/31959407542.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/savowaxefetigusalorijizit.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5b63d249a---femavedokenifabifizumi.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/belima.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/43025663852.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/kanajalabarurasivajone.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/ranubabu.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/zasexusadufirosepubatonem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=call+of+duty+cracked+apkPDF link annotation
    • 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_off0000e09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09E 20144 bytes
SHA-256: ee4a4d6b60270d90ea162609a06c55ea675cc50a0778bed3007bf3d3bf056957
font_01_sfnt_off000115d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEC 10588 bytes
SHA-256: 49a6a8ce1893b36c03ded98e4c87310223d3e8ffe58faf6b7940f954f72ec140