Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d4913004fe36ca…

MALICIOUS

PDF

86.7 KB Created: 2021-02-24 17:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2ea3b53ce7cd573c0463d410815848e4 SHA-1: b3544518b62cf5e83cc0949a0bf0bb249beb20ea SHA-256: a2d4913004fe36ca2fe9e928e71c7561ba5f0dc0090743c8e84f9bd3d778b1a8
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to health, which is then linked to a large number of external domains, indicating a link farm or phishing campaign. No scripts were extracted, but the presence of many external links points to an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=how+to+heal+your+body+from+the+inside+out PDF link annotation
    • https://cdn.sqhk.co/sifalavuxozo/gcwhgge/tezasadogorisuved.pdfIn PDF document text
    • https://cdn.sqhk.co/voravaxa/JLibchc/91547002582.pdfIn PDF document text
    • http://lazerepil.site/83848056403y1viy.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/cXhdwsT/troll_face_meme_sticker_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5fd0847707097.pdfIn PDF document text
    • http://whitetwo.space/the_covenant_fallout_4_test_answerspuo37.pdfIn PDF document text
    • http://palitra-cveta.ru/932158160033eich.pdfIn PDF document text
    • http://yewes.space/mozofinosugiluxagayab8h.pdfIn PDF document text
    • https://cdn.sqhk.co/kitijorawul/bhaicih/read_comics_online_dc_rebirth.pdfIn PDF document text
    • http://parkji5x.xyz/86787474995bztgl.pdfIn PDF document text
    • http://betapadu.22web.org/arithmetic_maths_by_rakesh_yadav.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/ihfidlE/ice_age_village_hack_download_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/egjejhc/86927744593.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/ieieaot/77746439500.pdfIn PDF document text
    • http://graatorama.space/shogun_near_me_phone_number4n7yx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001083b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083B 5324 bytes
SHA-256: ccc5f775ae3ba1fadc6b60fdab5741cdf537ed4ed5654ec786ec25274424a518
font_01_sfnt_off00011a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3C 11048 bytes
SHA-256: f5ee25dd364f5cff5da17a6292eca7227f70c820df9d0ebc2039a5d456a04f48
font_02_sfnt_off00013fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.