Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b776fb36ed0e2f6…

MALICIOUS

PDF

73.0 KB Created: 2021-02-11 18:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b173cc3719ebcea229bf083661dd3c53 SHA-1: a9fb37d5c5fa6a704ddb6e02bc34c76bcf2ff218 SHA-256: 5b776fb36ed0e2f62a7e8523eb5d1070f263bb28a622b3e62554abb3eb9afa8d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. The document body, though heavily obfuscated, contains text related to movie searches, aligning with a lure to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://bologen.ru/wix?keyword=brier+creek+movies+friday PDF link annotation
    • http://nazhivy.net/diganojakofunogeend3j.pdfIn PDF document text
    • http://ketadiets.site/jigsaw_puzzle_template_powerpoint8am85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480581/normal_601935f057efb.pdfIn PDF document text
    • http://vekenuv.iblogger.org/6627052676.pdfIn PDF document text
    • http://xsale.trade/1356939234y8ezs.pdfIn PDF document text
    • http://joy-todays.online/mujevax6mgnc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413585/normal_5fc810afc8a0a.pdfIn PDF document text
    • http://phulop.store/sifibitifelomofilinidoksly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_600a59fd8dce4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408172/normal_600284dd4c274.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/basezazopilokez5evbq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473388/normal_5fe0e9965eb51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451208/normal_5fe370efdc1d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fididebezewigex.epizy.com/ignou_b._ed_form_2019-_20.pdfIn PDF document text
    • http://wanalatuzukogax.epizy.com/25131945037.pdfIn PDF document text
    • http://fezogax.rf.gd/minecraft_crafting_guide_mod_1._13.pdfIn PDF document text
    • http://fozikabev.epizy.com/21986558843.pdfIn PDF document text
    • http://mafofeguf.epizy.com/procalcitonin-_guided_antimicrobial_therapy_in_critical_care.pdfIn PDF document text
    • http://jariluwalube.epizy.com/manerugewokeriguwowu.pdfIn PDF document text
    • http://tujijekaxevon.rf.gd/52597014993.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_off0000dfbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBE 5412 bytes
SHA-256: d8b7a172d65971827d4b4ee5447c2945fd660aaa0236f5e154f4643253fc7774
font_01_sfnt_off0000f224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 10968 bytes
SHA-256: 6827a2adf406606dfac812dfa7c50fcd0131523306dd51bbed87df816665bd6a

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