Malicious PDF — malware analysis report

Static analysis result for SHA-256 8251e8b301bd7619…

MALICIOUS

PDF

97.1 KB Created: 2021-03-30 16:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 349ad8dc0469d0850b9119b90ccfedb9 SHA-1: 26de45892c0a692c9e9a1dc84fdc1423fd901afe SHA-256: 8251e8b301bd7619d2a0f9d493a61c440806807cbedb1f82750daad1d4967712
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that leads to a link farm on disposable hosting, identified as a phishing lure. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'cd action' and PDF metadata, suggesting a phishing attempt disguised as a document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://leonvi.ru/award?keyword=cd+action+wszystkie+numery+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495055/normal_6039e2e053ea3.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/74362072265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379049/normal_5fffed6fb2bae.pdfIn PDF document text
    • http://kebakef.iblogger.org/12465784115.pdfIn PDF document text
    • http://gadosamu.iblogger.org/iso_22000_certification_requirements.pdfIn PDF document text
    • http://xonibiz.22web.org/wobelapem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491946/normal_5fcd564e34111.pdfIn PDF document text
    • http://mexawolin.medianewsonline.com/86002315369.pdfIn PDF document text
    • http://niwizonoleror.mywebcommunity.org/nopoxinelususuwe.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
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_51d09b72428b44b48fde7549a5ddaf42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8478dab7-60d8-4811-adec-2989775cc164/how_do_you_know_theres_something_wrong_with_your_kidneys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f198332-9bc1-445d-9842-f98b955049f3/62037377509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fcd8c09-a0cf-4466-8dbe-ea4a5427d44b/finafazosivurukapopimazes.pdfIn PDF document text
    • http://xolijuvusuv.epizy.com/adeste_fideles_sheet_music_free.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_c6b1dbf15d934bfab2400c51d8a92d58.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0da14ff6-bc93-4f48-a390-8f96f6cb2dff/kobatazuwemanurugov.pdfIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_ffc46d888c4e4f71853b8c8cb28a2a3b.pdf?index=trueIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_db4ebdd2505942f189f7d46f45b0ec4f.pdf?index=trueIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_e4780c1b69254527a39106b86e988fba.pdf?index=trueIn PDF document text
    • http://diginerovitigu.rf.gd/editing_file_on_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4677f2c-8669-4967-93b6-e4cbfa9b8a4b/dsc_user_codes.pdfIn PDF document text
    • http://xijejuvi.myartsonline.com/55027839581.pdfIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_fd2ffaff404244df85164f37cca14e7b.pdf?index=trueIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_fba4c974b03849df901fb0917f564cbe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C79 5480 bytes
SHA-256: f3ebe5f53ce02a54c4a2c58617620921f3c841230d4dc8f7a1284bf1654356b6
font_01_sfnt_off00013f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2C 13044 bytes
SHA-256: 64f11370ff81fa77aac90cee84a9daaa47ce9ec58a9a03e64f56623261166491
font_02_sfnt_off000168b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168B7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378