Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c279dae9285cb0…

MALICIOUS

PDF

76.5 KB Created: 2021-05-14 15:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f268b046812d71bf223b8a2a58cf9300 SHA-1: 05832e4e96e4f9a1cad95b4c26582ca9352b101f SHA-256: 47c279dae9285cb0ac80a29d07f46263bf72afbbc4b25ea15c564ea53ffc1834
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to host phishing content or malware. The PDF structure and the presence of external URIs suggest an attempt to redirect the user to malicious sites, aligning with spearphishing tactics.

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://baarspo.ru/strik?utm_term=who+does+violet+baudelaire+marry PDF link annotation
    • http://zebolalifitu.22web.org/gezisaxuguzatakazusumeg.pdfIn PDF document text
    • https://cdn.sqhk.co/xerolunem/avu8lVb/64563602676.pdfIn PDF document text
    • http://coupons2020.info/girlfriends_guide_to_divorce_cast_season_180b7h.pdfIn PDF document text
    • http://airet.space/436335569982suoa.pdfIn PDF document text
    • http://pressit.space/shamus_khan_privilegeiyhmq.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/gfWd84i/college_road_trip_movie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/jdNhamx/virus_stats_for_today.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/jii9gi5/poxisuw.pdfIn PDF document text
    • https://cdn.sqhk.co/jegetito/9fjbLih/marshmallow_root_powder.pdfIn PDF document text
    • http://tumbaa.space/woxusezunawenerexuvivjmgk8.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/jjuhbBk/lemon_cake_recipe_dairy_free.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/gjHrUgg/car_x_drift_racing_2_online.pdfIn PDF document text
    • http://makeyourself.xyz/minicraft_2_game866xg.pdfIn PDF document text
    • https://cdn.sqhk.co/mebinolopuf/jhyibib/balkar_ankhila_video_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/kujufemom/gix4iar/nazuwiwabomatubametisaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/29560891-087c-470d-847a-ba6e0ba14b88/agile_estimation_techniques_planning_poker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d5fb8fa-3a3b-4a90-8432-0db2f531c229/pimewiboz.pdfIn PDF document text
    • http://bireses.rf.gd/how_to_reset_a_frigidaire_gallery_refrigerator.pdfIn PDF document text
    • http://dinilemave.epizy.com/dutameritepavasok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e754e9-8c95-433c-9458-5f0bdce264e6/kixaluvod.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_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 5380 bytes
SHA-256: d7cbde819e7eca79604b87cd4d525f630c07590903a70748e608b798be359563
font_01_sfnt_off00010035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10035 10712 bytes
SHA-256: b55a248d0e7c4638dcf9ef32ae17eb6a05478c0ddccf89b410436c6a1b05b2de

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