Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabdd31eb06a4b8e…

MALICIOUS

PDF

71.3 KB Created: 2021-02-12 05:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: fcd4466f8356020438cc0f7fc7a5dc14 SHA-1: 2216302282f4b628f6754ad468ce24db76746e55 SHA-256: fabdd31eb06a4b8e0f7ec6db977f19aca5475c9422e311f91c70198c79f3de00
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_MFA_LURE' heuristic suggests it's designed for credential harvesting or session token theft. Numerous external URLs are embedded, likely serving as lures or downloaders for further stages. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a crafted document rather than a legitimate one.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://jacksth.ru/123?utm_term=fim+scores+cheat+sheet+physical+therapy PDF link annotation
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/xivajesexowuve.pdfIn PDF document text
    • https://xevefoworux.weebly.com/uploads/1/3/1/3/131380592/9546283.pdfIn PDF document text
    • http://golomashvanna.xyz/6827817817071q8f.pdfIn PDF document text
    • http://vudujupuboneg.22web.org/94362809962.pdfIn PDF document text
    • http://adyga.site/binexado8f11g.pdfIn PDF document text
    • http://eeeeeyyy.space/young_freedman_university_physics_13th_edition532oc.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/dedd0f292ad90d.pdfIn PDF document text
    • https://tokegomobox.weebly.com/uploads/1/3/4/3/134314144/suferijura_vuzesuxoko.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/7qUhcha/piverosamuj.pdfIn PDF document text
    • https://veraroligesabo.weebly.com/uploads/1/3/4/3/134377370/jivemowoxugejiz.pdfIn PDF document text
    • https://dibozuvoba.weebly.com/uploads/1/3/4/6/134692955/9304846.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/arabic_kadaloram_remix_song_free9z71q.pdfIn PDF document text
    • http://my-favshopg.online/decode_duo_codenames_duet_online_localsze0ou.pdfIn PDF document text
    • http://electrumwallet.buzz/couple_avatar_make_your_own_couple_avatar_apk9pqkh.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/jb4hJQ4/rejudaparuzakamuw.pdfIn PDF document text
    • https://livuwijonirib.weebly.com/uploads/1/3/4/7/134732661/kifanebidi.pdfIn PDF document text
    • http://idealicaitalia.website/business_in_a_box_keygen_freeyxagg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vapedefomagejev.epizy.com/75158925568.pdfIn PDF document text
    • http://wepaxilex.epizy.com/791375403.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_off0000d816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD816 5228 bytes
SHA-256: 2a1999c6d738dde9bfdf3103bd714ce2af2ddd9c48c2b93b7811a3d4b5bbfff8
font_01_sfnt_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 10884 bytes
SHA-256: 3e97c94aceb9db90dc0546c6e8b21078c1b139340efda83cb75cbaf35ed11db7

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