Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a46544113408e11…

MALICIOUS

PDF

74.5 KB Created: 2021-09-08 16:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 0980b176592a9898ec5f477c630aafd4 SHA-1: 21557e20fe4de85bf4ace36f50327cbd817f14ad SHA-256: 3a46544113408e1194b2d9a4b8cc6a8845df48a9e597a22d2068349a033c84a3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bibliothequedesarts.ch/ckfinder/userfiles/files/narin.pdf In PDF document text
    • http://watchimport.eu/userfiles/file/rosogalisitafeterutim.pdfIn PDF document text
    • https://kimcert.net/E/file/99215661245.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/88020297333.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/61755708875.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/jegebojutitevogolav.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/50536418112.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/mariwutiviwabufepekukabeb.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/55419901547.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/32998040352.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/15994305948.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/27485264321.pdfIn PDF document text
    • http://turinimoti.com/assets/userfiles/file/nivuvovizag.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/59748666698.pdfIn PDF document text
    • https://cobaltinc.org/userfiles/file/ruzativarujisafilesipuji.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/27478248561.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/6965274940.pdfIn PDF document text
    • http://guchen.ru/d/files/kujenofogesaxitulunarite.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/98523712661.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/9255876811.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/48634406289.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=data+wrangling+with+pandas+cheat+sheet+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD6C 10868 bytes
SHA-256: a1d903a26410641b916845ad30884c09a71685fb82e270d20528c2a70ae03e4d
font_01_sfnt_off0000d657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD657 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE69 17572 bytes
SHA-256: 63f8455bfdfdd339647f4140bc9dcd264aeaab2d6db8a9ac5a04f59392bfccf5

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