Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4be5195055462e…

MALICIOUS

PDF

75.4 KB Created: 2021-01-29 03:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 11f25a7b0e65cb79020a4f715636a911 SHA-1: fd695041c65f0a6c0563ce0b7509bbb50f2aeb7d SHA-256: 0d4be5195055462e46bb43a7b43cbdd4b325fbb2da34186fd8545a6309585d56
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It presents a fake "Admit card for rrb je exam" and contains multiple links to disposable domains, suggesting an attempt to redirect users to malicious sites. The presence of an MFA lure heuristic indicates a potential for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/aws?utm_term=admit+card+for+rrb+je+exam PDF link annotation
    • http://static-get.top/pirate_chest_hobby_lobbygolrx.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/fjegfjj/12802715196.pdfIn PDF document text
    • http://wordsidepost.top/american_ninja_warrior_awesome_momentsasuqx.pdfIn PDF document text
    • http://miiliioner.xyz/kurepy21c0.pdfIn PDF document text
    • https://gixunilaw.weebly.com/uploads/1/3/1/8/131856646/8376803.pdfIn PDF document text
    • https://cdn.sqhk.co/zarifabidit/tMv4jbi/pokemon_go_promo_codes_september_2020.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/09a36f4ca.pdfIn PDF document text
    • http://hytri.com/rakegiwobofotowiguxkub3u.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/170473.pdfIn PDF document text
    • https://jotabejomunumog.weebly.com/uploads/1/3/0/8/130813846/815015.pdfIn PDF document text
    • http://depofukug.iblogger.org/joomla_3_template_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rokabimokow.rf.gd/kim_possible_kimmunicator_template.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB65 5228 bytes
SHA-256: 3d3df6cc5b6081d06ba5b964afb6281b342952bff9e383b5ceb147d4ea8661bc
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 10608 bytes
SHA-256: 5de097fd1814c4ebd1b9a125d594179ff7172b4ac6e3ac599e2b9b1587ed346e

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