Malicious PDF — malware analysis report

Static analysis result for SHA-256 16fe7a0e60455222…

MALICIOUS

PDF

78.5 KB Created: 2021-03-19 04:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 29ad2920616ab6fcf85c9ac6eb451bdf SHA-1: 47d970d32c68116cbce10605cba7ab5fc6151dd2 SHA-256: 16fe7a0e604552228804ece5ec9001c213456517fbf2233db85d0f76b2a73cbc
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • 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://lozipotod.ru/strik?utm_term=computer+hardware+engineer+salary+california PDF link annotation
    • https://cdn.sqhk.co/pofifarim/jetgcjh/roadside_attractions_map_michigan.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/WhfIxjj/play_store_install_app_download.pdfIn PDF document text
    • http://femuvapazurom.iblogger.org/which_is_correct_more_grease_to_your_elbow_or_more_power_to_your_elbow.pdfIn PDF document text
    • http://xubatazu.22web.org/81386801448.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/fqHAjjn/oxygen_levels_covid_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/SBjchdt/saxevijivunivokir.pdfIn PDF document text
    • https://cdn.sqhk.co/kiraxozi/XZjbgfp/pioneer_arc_app_android_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wotinobeb/gGibnhd/babetiwikukimisutimuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/5giiMjg/jivamigitibizif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pujizugikejoxa.rf.gd/endocrinology_guidelines_testosterone.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/cladding_sheet_material.pdfIn PDF document text
    • https://d0fd22f1-78bd-4368-960d-2a324028b2bb.filesusr.com/ugd/a4d998_ce7ff133220f403b8f682f113b6f370a.pdf?index=trueIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_9cbd8f8434b449c49ed091098d034fd3.pdf?index=trueIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_4653ad5249e445bab4e73e4a59533650.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xubifupi/30768773683.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_3b4b2518a348450db636add2264883b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/bafezipasusorapofes.pdfIn PDF document text
    • http://lijomoxanegug.rf.gd/vampire_diaries_cast_season_3_episode_7.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/boxevonaliledagusejedu.pdfIn PDF document text
    • http://savekuf.rf.gd/britax_marathon_clicktight_adjust_shoulder_straps.pdfIn PDF document text
    • http://tuzoxizusuzu.epizy.com/kivibotezuxogavezuzuw.pdfIn PDF document text
    • http://xokovuwewa.epizy.com/18355638174.pdfIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_f8bfd69ed7c741e5ab8a957aa808f294.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fogibi/63298272126.pdfIn PDF document text
    • http://zivakafipudejiw.epizy.com/xutepuwono.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_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 5668 bytes
SHA-256: 10ad4ae804b8824c117bfb8615c24498323a008d20de8ef2a9a943d68d9b8a29
font_01_sfnt_off00010605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10605 11144 bytes
SHA-256: 687069a891aa4fbfcbeec067910510451f48d181d3b88ed18b7be0abffb67112