Malicious PDF — malware analysis report

Static analysis result for SHA-256 d189269dd4fbcd20…

MALICIOUS

PDF

76.4 KB Created: 2021-03-14 18:04:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7a25f81d29881074fc141ca33ff81cd6 SHA-1: 9200a7196e23e4ca14a3040476bbaf4dcd8063d2 SHA-256: d189269dd4fbcd20c8dcea318b9a4fc81b75c6c637025f39226da0580f090d39
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/award?keyword=affiliate+marketing+business+model+pdf PDF link annotation
    • http://helplnstagramcontact6088758.com/98160912427l2v52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_602539087648e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5fdab852f2dd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444353/normal_5fe3a9a23b1ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_5fd6647e3b9e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_60386264e73a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461216/normal_6028efdcee7df.pdfIn PDF document text
    • http://proita.fun/40000750970bdmmg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419637/normal_5fecca8d0efc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490722/normal_5fd9b384cbea1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_602e556439165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466151/normal_6010b2c9a4785.pdfIn PDF document text
    • http://bigtittybella.com/wufenapegowetumaripz41l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490961/normal_5ffb7952a3688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473419/normal_60250ce141dcc.pdfIn PDF document text
    • http://adanakebap.org/amelie_nothomb_librospcvl0.pdfIn PDF document text
    • http://mowuvivof.22web.org/warhammer_40k_8th_edition_rulebook_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_6013e92650a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416504/normal_5fd8722ff2cf4.pdfIn PDF document text
    • http://blue-tick-central.com/nedutekavijajoz2vf1.pdfIn PDF document text
    • http://kayikciakademi.com/reloading_supplies_for_224_valkyriee8pb8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wapanemajefo.rf.gd/sword_art_online_games_ranked.pdfIn PDF document text
    • http://zotuxegusam.epizy.com/tofeverekorutuduw.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_off0000eafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFD 5552 bytes
SHA-256: 29e611f0d2bd016910c338ad0b0e44f49e1ceb3847641c350a58fe3f9d37118b
font_01_sfnt_off0000fdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCB 11256 bytes
SHA-256: c3a12c5d73de89b9cb3910a3f4c7e023dd33928e2d3d05c03e8f86b9057d5579

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