Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e09001abe8f881…

MALICIOUS

PDF

79.2 KB Created: 2021-04-05 11:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcf205f6f0e824a8c762f8361842de3d SHA-1: d6a42da0305e81b643989e5ffc252f1c02bc67d4 SHA-256: 70e09001abe8f8816726fb2a4f125dbc2caece887c7696de3a2425b8e5bf7f66
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=dj+tamil+new+album+song
    • http://urolog.xyz/mimujxmu6u.pdf
    • https://kewidanuratug.weebly.com/uploads/1/3/5/3/135323433/midonisurogefadi.pdf
    • https://cdn.sqhk.co/bamikalagov/Vegcpm7/tifururedalerowipaz.pdf
    • https://ganunosor.weebly.com/uploads/1/3/0/8/130814229/mozul.pdf
    • https://cdn.sqhk.co/dolavalof/iZgeKhi/game_backlog_organizer.pdf
    • https://cdn-cms.f-static.net/uploads/4492901/normal_5fe67885405be.pdf
    • http://detonic-shop.website/kebobiwakuwobogoj4ymfe.pdf
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/7245470.pdf
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/1237660.pdf
    • https://cdn-cms.f-static.net/uploads/4422906/normal_60508c6bf349a.pdf
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/3357352.pdf
    • https://cdn.sqhk.co/balatexoriv/jggMVje/lecture_notes_tutorial_android.pdf
    • https://cdn.sqhk.co/xivomojuf/jceBhd8/startup_kdrama_cast_han_ji_pyeong_young.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sosefaxerutujax.rf.gd/larebobedosaximevizunadid.pdf
    • http://rabepubi.rf.gd/911193414.pdf
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_5c4bd265e1f949da8d7d2bdbf51d8c9c.pdf?index=true
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_fa13bf27878345928ff778975d19bd47.pdf?index=true
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_a27c516c27924b8aab1fcd1126faa22b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8fa.bin
e390cbc8b6370335fc1747e255af1382ab3219d862b1afed011eefb12db84376		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FA 5216 bytes
font_01_sfnt_off00010ac9.bin
f00029bb15e582b474aa8c4c5bda09be1c144af6b1af7810bc3396c4d7e4a0d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC9 10772 bytes

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