Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1f8818d48f3205…

MALICIOUS

PDF

89.3 KB Created: 2021-06-07 23:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 66233d14d35ce801f3c035dc0892eeac SHA-1: 336c4d451eff3c290721c7f6c58826dba83ebda8 SHA-256: 9c1f8818d48f3205efedaf50821b81798d1f36272890919d8b377a54c8080fad
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of many unknown reputation URLs point towards malicious activity.

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://huntic.ru/pbw?utm_term=orando+en+el+esp%25C3%25ADritu+santo PDF link annotation
    • https://jovovanin.weebly.com/uploads/1/3/1/8/131871717/ef296284.pdfIn PDF document text
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/f71d76cd63bf0b.pdfIn PDF document text
    • https://lirupije.weebly.com/uploads/1/3/1/6/131606624/4513558.pdfIn PDF document text
    • https://sokarapojuler.weebly.com/uploads/1/3/1/1/131163736/2208731.pdfIn PDF document text
    • https://siragakepog.weebly.com/uploads/1/3/4/8/134890789/borenijiropedesipujo.pdfIn PDF document text
    • https://xigepeseforala.weebly.com/uploads/1/3/4/5/134508125/xewajivotoduru.pdfIn PDF document text
    • https://bepopasexib.weebly.com/uploads/1/3/4/3/134356469/ed80dc087ae09.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/6252870.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://jazonewu.pbworks.com/f/pokemon_sword_and_shield_apk_download_for_android_free.pdfIn PDF document text
    • http://pajajafilexe.pbworks.com/w/file/fetch/144764886/set_it_off_pelicula_gratis.pdfIn PDF document text
    • http://tujezowosop.pbworks.com/w/file/fetch/144738108/87284945005.pdfIn PDF document text
    • http://kunozulig.pbworks.com/f/fijexugitowafanukulisej.pdfIn PDF document text
    • http://texuxokubu.pbworks.com/f/xonedoxomaler.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/w/file/fetch/144632802/rebuzosixamamubogubux.pdfIn PDF document text
    • http://vafobotigef.pbworks.com/w/file/fetch/144526563/gebufujiduwozuletifubuke.pdfIn PDF document text
    • http://xereledo.pbworks.com/f/5631097558.pdfIn PDF document text
    • http://ximusutoj.pbworks.com/w/file/fetch/144747393/47374406788.pdfIn PDF document text
    • http://lijunew.pbworks.com/f/tajojofoganefupiwosaxoje.pdfIn PDF document text
    • http://dawanitapix.pbworks.com/f/best_free_ringtone_app_for_android_phones.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A0 4916 bytes
SHA-256: ec57596e54e3c766235c13f47d450c1085c6239bb66144e9f979bd63f578de39
font_01_sfnt_off00012161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12161 11968 bytes
SHA-256: 95cce24186c5c29dc1a9a6ea508981df123df971165b5e9d25389622beeafe61
font_02_sfnt_off0001480e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1480E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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