Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0145b9a7035702d…

MALICIOUS

PDF

159.1 KB Created: 2021-04-05 16:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 94e017e03ce72b6d15f3bc42420e3e20 SHA-1: e78f3ef0a8835c987a3be31bbb7f0e986d8bc147 SHA-256: d0145b9a7035702d5c8b9f89bb89950977a59588c35016d834b45a71a1b55fe3
186 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged for brand-impersonation credential phishing (UPS). It contains numerous embedded URLs, many pointing to disposable hosting or redirectors, designed to lure users into clicking a link. The PDF's structure and embedded content suggest it exploits PDF vulnerabilities to execute malicious actions, likely involving JavaScript, to facilitate the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/rujilezokugeduf.pdf.
  • 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/award?keyword=afera+watergate+pdf PDF link annotation
    • https://cdn.sqhk.co/wotedimozer/8ThjBhb/lojijar.pdfIn PDF document text
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/rujilezokugeduf.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/jivodawimutuwonerutip.pdfIn PDF document text
    • https://cdn.sqhk.co/genepajev/uggjhJt/53995376745.pdfIn PDF document text
    • https://sebiwijojemobod.weebly.com/uploads/1/3/4/0/134097571/xurogiruk.pdfIn PDF document text
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/f1d5d2.pdfIn PDF document text
    • https://relorurexo.weebly.com/uploads/1/3/5/3/135391300/kakagubuzamize_zogis.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/jh9higj/50874813262.pdfIn PDF document text
    • https://lopomibuliwipa.weebly.com/uploads/1/3/1/3/131381919/632079.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/86700870789.pdfIn PDF document text
    • https://cdn.sqhk.co/xesagomi/cidhgic/gadiwado.pdfIn PDF document text
    • https://roxagidu.weebly.com/uploads/1/3/4/7/134748987/2076301.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_8384f5d28d0944049f5270ebf590b07a.pdf?index=trueIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_04cd273503f54680b716645126d903d2.pdf?index=trueIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_749ff5c296ef44c29c0785176d87c4ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nawuvud/werafabunitaj.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/fudiku.pdfIn PDF document text
    • https://9eff4bf0-55a5-42b9-a65a-250f23c32afd.filesusr.com/ugd/80978b_eb4539c956714aa29f349a27ae4a5b8a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2312D 5080 bytes
SHA-256: ef9fa7e29bf0ce9e66ae67cefde49d8a26513b9b9a02ec77e5e9e86bf8d2bea4
font_01_sfnt_off000242a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x242A1 13356 bytes
SHA-256: 07e8b431fceb92707c9e44ea04808fae63b50ce89cd64ef0218c4bc415719d38

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