Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2642fa743fc529…

MALICIOUS

PDF

76.6 KB Created: 2021-03-09 14:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c32c832a5feb6a992d28dfb49ed23e2c SHA-1: 251773c39022906cdcb59d237b4965dffb488876 SHA-256: 6c2642fa743fc529bac80cdde017cc8fb4bb68f6e44890cb39127327b33adbfc
194 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many of which point to disposable hosting services and are likely part of a link farm designed to distribute malicious content. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading potentially harmful files, such as the 'pizza vs skeletons apk' referenced in one of the URLs. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/wix?keyword=pizza+vs+skeletons+apk PDF link annotation
    • https://cdn.sqhk.co/jigixomavola/jwXVjaS/jazifazebojilufapagufow.pdfIn PDF document text
    • https://cdn.sqhk.co/bupitagalir/bic2cjf/bsava_manual_of_exotic_pets.pdfIn PDF document text
    • https://bexenexitefixu.weebly.com/uploads/1/3/4/7/134725849/5600422.pdfIn PDF document text
    • https://muzuwetabez.weebly.com/uploads/1/3/1/4/131483468/wifojinibesona.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/cidjaum/ccleaner_pro_terbaru_2018.pdfIn PDF document text
    • https://lukidamovepuk.weebly.com/uploads/1/3/1/4/131437538/2007126.pdfIn PDF document text
    • https://banukusisazej.weebly.com/uploads/1/3/4/8/134893357/xezafol-joxobanesivazo-bidenon.pdfIn PDF document text
    • https://zixudepapu.weebly.com/uploads/1/3/2/3/132303172/topinoresoduk.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/4oMG9iZ/nintendo_3ds_xl_gold_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/AWhfxaL/ruxajinisirafudozo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vovuzize/31125007119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3381f27c-e1a5-40d4-8f82-ea5551d05e4e/shadow_mountain_community_church_attendance.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/what_is_f_test_critical_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e06e464-2228-4e81-ab4f-e2b3b84ce126/vaporesso_renova_zero_kit_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de28cf39-6f28-44c3-8901-688094715db8/45077710801.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_off0000f181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF181 4892 bytes
SHA-256: 7164b2b9a4dc7bf38f084a2bffdad0ffd39aa58684ebf52d9d029c2d38c9ee21
font_01_sfnt_off00010250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10250 10412 bytes
SHA-256: 1dcf24bf428ea3d60f15452f773558fe5fbf8e8212d823658f0740d13da96f53

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