Malicious PDF — malware analysis report

Static analysis result for SHA-256 472af302dc1d0129…

MALICIOUS

PDF

100.3 KB Created: 2021-03-21 11:32:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b4f5f754a89e2b109b3f0be006864769 SHA-1: b1901ea5d3b5cda6c7550c1844812f6112db8e48 SHA-256: 472af302dc1d012918e531e245a00cf77332161aa10cde5562ec0f05453e6629
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination or distribute malware through a large number of links.

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://ponafet.ru/wix?keyword=grimorium+verum+pdf+pl PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5fc7c724a4afc.pdfIn PDF document text
    • http://instapriz24.online/planeacion_de_tercer_gradoo26ck.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473638/normal_5ffe4690a9ed8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_5fd62c417f101.pdfIn PDF document text
    • http://123dutch.com/tai_chi_ball_workout_for_beginnersjswrn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_600e64c5ee4af.pdfIn PDF document text
    • http://grigolia-studio.ru/mewujolujajifosagazekedukpa4ru.pdfIn PDF document text
    • http://vokezex.iblogger.org/anticoagulation_post_orthopedic_surgery_guidelines.pdfIn PDF document text
    • http://peludofnor.fun/uphill_rush_water_park_racing_hack_apk_downloadx29bl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423780/normal_5fd10cb0572d5.pdfIn PDF document text
    • https://kimetupuvojum.weebly.com/uploads/1/3/2/6/132680977/1446ab42f.pdfIn PDF document text
    • https://folenepawesig.weebly.com/uploads/1/3/2/6/132680852/cd52c73e4f391b7.pdfIn PDF document text
    • http://kabanozz.wIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_2721947d8ebb417caac5375cea884daa.pdf?index=trueIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_b16c06c6b77c403595e4effa1c876d83.pdf?index=trueIn PDF document text
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_9f51b34ee7e1452b9d92019ec9cc9fa3.pdf?index=trueIn PDF document text
    • http://nolapejaselijak.epizy.com/fezazo.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_91cd5a557d954c29a55a5396c6f8285b.pdf?index=trueIn PDF document text
    • http://zejagal.rf.gd/13588224912.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/37264930759.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/16825117629.pdfIn PDF document text
    • http://wawefib.rf.gd/weraduxelamaliziragizupuj.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_off00014af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF4 4888 bytes
SHA-256: 63ff7425226f424de87f101175ec59f963939b9094e1b82b6ac6b25139a3e8a8
font_01_sfnt_off00015b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B8C 12380 bytes
SHA-256: dfe6500d076096209f7bbcf9684296d8e96a793585a35db7e2102ae72b50397a

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