Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e199d1e6c7eaa9c…

MALICIOUS

PDF

85.6 KB Created: 2021-03-15 07:56:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e17f71045d3e4dcf48a0b6fd945493d4 SHA-1: 219bebc904fa6abd875ef95e0e71bab6c8e2f327 SHA-256: 6e199d1e6c7eaa9cfc3cb3b96d4cb7685fc687e14d55702a3ee590737bc9a155
226 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, specifically a browser extension or update installation scam. It contains numerous external links, many pointing to disposable hosting, and is flagged by multiple heuristics including ClamAV and an ML classifier as malicious. The primary lure appears to be a fake browser update, likely intended to trick users into downloading and executing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://pelibifir.ru/123?utm_term=chrome+browser+apk++free PDF link annotation
    • https://cdn.sqhk.co/fasegibuniz/lNfAFMu/basilea_1_completo.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/HNtERjb/31052316944.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/dEGVrjd/nefur.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/jorgewo/61849275223.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/tibUjcl/mine_mob_clicker_rpg.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/jat4Rie/91406291911.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/phjBmhe/dadumorejataw.pdfIn PDF document text
    • http://dibiwarisogix.mygamesonline.org/contract_costing_solved_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/bgcgetW/sizozulumejomugex.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/SjcOhgc/bubble_popper_fidget_toy_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/penunotati/jf1OhgK/standoff_2_pc_download_2020.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://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_e8c1eed0f8834922a16d4deedf0f0418.pdf?index=trueIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_aea1c82aab6e443cb24227eff3ca63f2.pdf?index=trueIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_02a78fa37fe54d52a888ce28334b2c67.pdf?index=trueIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_eb6c4011419f441e8cdae5472d91d40d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b5e4a4-19f7-45b1-a50d-30ba2a1e7c17/maytag_washer_will_not_complete_cycle.pdfIn PDF document text
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_9f8fbf73f2784a2e938fbf8c9caa7516.pdf?index=trueIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_bc8b38a3f6c845bd95a960cd4e203130.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8492ae52-a7cc-47a9-8399-fe889d944286/gikonilaxujusaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17bc7211-fee2-4448-bd2a-415f50c54fc5/zorakinimomewopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b423f7f0-7c92-454f-8e72-d431489bea3e/77323552505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a967c3-4701-410d-8d18-65d5ad114e48/31102416539.pdfIn PDF document text
    • http://bexovivuvere.myartsonline.com/conversion_to_word_document_online.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_f567837611a94930b75e34d127d23067.pdf?index=trueIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_25c2401cf17145408629f4053119426a.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_off000101c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C7 4980 bytes
SHA-256: 60a88702d0eabaf3fe0adc851d881c2a8644d8501bb7fd4e7c48edca56f4027f
font_01_sfnt_off000112bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BC 12076 bytes
SHA-256: 1523869699d4f0418b1a8a3f4b1e018f58bc6f987e5b5736b3cde47d1950361a
font_02_sfnt_off00013a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34