Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74abd86a44f92cb…

MALICIOUS

PDF

74.8 KB Created: 2021-02-18 09:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 38fd5ae12bcd424b56da41c164fdf133 SHA-1: d1e39547c615c8dc83a5254567bc955568ea9fc3 SHA-256: d74abd86a44f92cb2a7f993dcb935dbef956b327823f0023b772ab529701c2a5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded URLs, many of which point to disposable or suspicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=dyson+ball+animal+2+total+clean+vacuum+best+price PDF link annotation
    • http://fofafowazu.66ghz.com/maharshi_telugu_video_songs_hd.pdfIn PDF document text
    • http://dressnbuy.com/ncert_history_book_class_10_answersjyk4q.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/jc2KXWH/vekaxuvazog.pdfIn PDF document text
    • http://nekretnine.site/circuit_electrique_lumiere_interrupteur_va_et_vienthqh9i.pdfIn PDF document text
    • http://regvoolkim.website/83251251437l5x9g.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/AEhihjw/how_to_play_blackjack_online_with_friends.pdfIn PDF document text
    • http://7gusevshop.space/faith_reformed_baptist_church_mediayqr4e.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/LTKhaib/lilademaniki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lewuli/lupopobosopuxetu.pdfIn PDF document text
    • http://mixipazotan.epizy.com/nice_guidelines_cerebral_palsy_adults.pdfIn PDF document text
    • http://zanukabijegur.rf.gd/girer.pdfIn PDF document text
    • http://tisudaxutuz.epizy.com/feasibility_report_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/books_to_read_for_unborn_baby.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/cis-_2-_butene_heat_of_formation.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_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 5512 bytes
SHA-256: b98a04c2ed5194cda1e63f81b9d912d69e9b478765d0a56a6c7c81cf859badb5
font_01_sfnt_off0000f940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF940 10912 bytes
SHA-256: f95cfc0bb9e5e9db26c773d0619c7776e0e1362daa1e37dcb1efe52ead5087b0

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