Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fafdb6d3082703f…

MALICIOUS

PDF

77.2 KB Created: 2021-04-06 00:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 850e644d73d392996edeccc43304f208 SHA-1: a12f5cb19e0bba20b2138f206d1e0ae28f2a5b84 SHA-256: 1fafdb6d3082703f88e5004a8f59d81f505078c53ae0724f3d080459910f73f2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to link farms and disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=foundations+of+astrophysics+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385434/normal_5fd76dffeb919.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/Nchdjjd/991400832.pdfIn PDF document text
    • http://opt05.ru/what_is_the_bsa_scout_law1u11h.pdfIn PDF document text
    • http://erethiztzj.space/melusenanuxonhjda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465387/normal_600b2abcb9812.pdfIn PDF document text
    • https://cdn.sqhk.co/zitiwofiru/j5qgjjf/barbie_wedding_cake_game.pdfIn PDF document text
    • http://dipufuvolog.iblogger.org/1377749571.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425514/normal_5ff2aeec6e320.pdfIn PDF document text
    • http://neriwor.medianewsonline.com/pupatezabuxikudanekinuke.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/manco_red_fox_go_kart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413007/normal_600a4815d4166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444882/normal_600202f2da770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_6026191155dd9.pdfIn PDF document text
    • http://tapavinologo.mygamesonline.org/fejavigiwez.pdfIn PDF document text
    • http://detonic-ufficiale.website/wetelodpg36.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/48366420589.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://mukexojot.rf.gd/73090752819.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/80091453943.pdfIn PDF document text
    • http://nipimixo.epizy.com/no_report_compiler_set_for_language_java.pdfIn PDF document text
    • http://xifogufog.epizy.com/balsalazide_davis.pdfIn PDF document text
    • http://nonetol.rf.gd/99743351821.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_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 5032 bytes
SHA-256: f5032f98128b63ca055608c8b2d96e04a0f14cfba698dc00c0670eb89e23d2a7
font_01_sfnt_off0000f321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF321 10812 bytes
SHA-256: eede87a0a5a2058112cec45e9d4716679b2bef36e740f2879c1610e692c9d416
font_02_sfnt_off000117e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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