Malicious PDF — malware analysis report

Static analysis result for SHA-256 86afdf227b43c601…

MALICIOUS

PDF

78.9 KB Created: 2021-04-01 00:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f51722d1d6777603852cc45271ded280 SHA-1: 6fc09ac0d589ad95349d8e4f792552f9e3762b0c SHA-256: 86afdf227b43c601a2f6ebe7a3581491649ea02ecf5577e23c009e59c8da2bc2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to malicious or phishing sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or credential harvesting. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://zajinet.ru/award?keyword=liquid+rocket+engine+combustion+instability+pdf PDF link annotation
    • http://midimox.getenjoyment.net/voxolesavowekuwosan.pdfIn PDF document text
    • http://japarof.mywebcommunity.org/how_to_get_ready_to_run_a_half_marathon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471240/normal_5fcaedc712a3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403937/normal_60021901a81a0.pdfIn PDF document text
    • https://bepewosub.weebly.com/uploads/1/3/4/4/134445398/6365fcb.pdfIn PDF document text
    • https://jesipawuba.weebly.com/uploads/1/3/0/8/130874316/2647242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381534/normal_600fca825f6cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_6021c2912f525.pdfIn PDF document text
    • https://vokavize.weebly.com/uploads/1/3/2/7/132710687/3082005.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/12172474699.pdfIn PDF document text
    • https://jarupaxalimex.weebly.com/uploads/1/3/5/3/135324443/9782091.pdfIn PDF document text
    • http://zagozogenef.sportsontheweb.net/55122913284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_6009f00b7d22e.pdfIn PDF document text
    • https://vawemuziz.weebly.com/uploads/1/3/5/3/135351027/6ea990.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fabonejane.onlinewebshop.net/fupevinixawikukulunisew.pdfIn PDF document text
    • http://setixebasedi.epizy.com/62217907730.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/jepojezejutero.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/kifugamonozolujuvezenew.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/functional_skills_english_level_1_book.pdfIn PDF document text
    • http://gekomulo.rf.gd/financial_breakthrough_prayer_points.pdfIn PDF document text
    • http://bagegamejejupu.epizy.com/49690598886.pdfIn PDF document text
    • http://taguloxutenafol.myartsonline.com/how_to_adjust_bobbin_tension_on_singer_simple.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B2 5728 bytes
SHA-256: 8eab45b22468fb6424b9c4da54cf00ff05fac67c1d09c565a7def210189aaea2
font_01_sfnt_off0000fb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB15 10736 bytes
SHA-256: 6c84d60830b401f79803340b5c168acb74eab9f0234546586c9e419dc7d617d4
font_02_sfnt_off00011fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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