Malicious PDF — malware analysis report

Static analysis result for SHA-256 b978fdad950ba4cf…

MALICIOUS

PDF

120.2 KB Created: 2021-03-24 10:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 658af28ae1a5acbe054fa30e189fe4a6 SHA-1: be800a93b9204b33bddba0b207817da844bc9de4 SHA-256: b978fdad950ba4cf4f1e353a62be903f0d0f0daf1414305ce37b17d8da961ead
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and exhibits characteristics of a link farm designed to redirect users. The document's structure and embedded links suggest it is part of a phishing campaign aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xezojetit.ru/award?keyword=communicative+english+book+pdf+free+download PDF link annotation
    • http://bulapufidexiz.iblogger.org/how_long_does_splat_rebellious_colors_last.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_6021d3375aaf8.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_6018dd99e5541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448540/normal_60097bce2e945.pdfIn PDF document text
    • http://frontglass.xyz/consumer_reports_french_door_refrigerators_2019khssy.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/5jehh9f/12300594653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417523/normal_603589bc49311.pdfIn PDF document text
    • http://reduslimitalia.site/11220993424ivn85.pdfIn PDF document text
    • http://naturebiolog.space/natakasavezosareeixu9.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/wamigozodukoferarupozujk5cv2.pdfIn PDF document text
    • https://cdn.sqhk.co/wewuxujudu/ZckTOgj/cessna_310q_poh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_c8c06082b6574668857b18ce3b9c6dba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/58078c22-85ae-4665-b88f-01032cc533c7/winter_house_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25963329-29c8-46f6-87ec-34978469b673/best_atomic_physics_textbook.pdfIn PDF document text
    • http://kusugafunerepo.rf.gd/arabic_story_books_with_english_translation.pdfIn PDF document text
    • http://vevojadiren.epizy.com/13735290018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/008b9917-9e83-4e11-90e6-cdae964093bc/lixifapimuvobewojufi.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_ffcbac22fd524bdab0c1a9fb50d991b1.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000196d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196D5 5832 bytes
SHA-256: b0a8c2e80e19dd379db9a9040842dc786a08c70507d856de383be88a2252fc57
font_01_sfnt_off0001aa8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA8F 12152 bytes
SHA-256: 71cc411359d26fe25f92aff14cbc05d53e9aacc8772483137eb8510f1d93f443

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