Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c880cfdeb861d6…

MALICIOUS

PDF

76.8 KB Created: 2021-03-10 10:05:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 208559591c67c072ef8f7c116d3b5ed7 SHA-1: 91780823679e4864d21e267a1cd30fcfbd934339 SHA-256: f7c880cfdeb861d68790791876fc10ef4cb10067e63d387476e468402857573b
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ponafet.ru/strik?utm_term=what+is+a+plex+claim+token PDF link annotation
    • https://cdn.sqhk.co/ranemagesoga/c0hhiji/34731216564.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/waware-dodafusolikez.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/kivuturov_zilerare.pdfIn PDF document text
    • http://smartcoin.design/most_common_english_phrases_used_in_daily_lifeu3r67.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/ielgfgf/doom_eternal_ps5_release_date.pdfIn PDF document text
    • https://gaxizizobepebi.weebly.com/uploads/1/3/0/7/130740618/fulosoze.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/0jdFjfV/nemudowixu.pdfIn PDF document text
    • http://shoppermarket.online/how_to_do_basic_home_electrical_wiring4saxf.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuluni/FjbfQky/jaweloxutolidilisivimuken.pdfIn PDF document text
    • https://cdn.sqhk.co/jigidokasaga/H9fGPjj/queen_greatest_hits_2_lp_vinyl.pdfIn PDF document text
    • http://myshoes.moscow/inconvenient_sequel_truth_to_power_answerst5jr8.pdfIn PDF document text
    • http://hihikane.space/sony_cdx-gt450u_user_manual527h6.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/g38Yqih/benign_paroxysmal_positional_vertigo_exercises_epley.pdfIn PDF document text
    • https://niforobufuxir.weebly.com/uploads/1/3/4/5/134512868/2797454.pdfIn PDF document text
    • https://cdn.sqhk.co/fowurona/ije3yjc/sonny_bryan_s_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijepexaran.epizy.com/delevovujolo.pdfIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_e692c6f57a044d4a961a1962946ae388.pdf?index=trueIn PDF document text
    • http://javasuk.epizy.com/vonagenarigi.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_929b93d2c8794deaaaf8dda641726b15.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5C 5220 bytes
SHA-256: 9169b0d31acbe1e3974af29270ed1df3afa7a51e5fd4b1a180208489bfec18c3
font_01_sfnt_off0000ff0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0C 11332 bytes
SHA-256: c0bea630d05e076b9ad98ddafaf1b9854fd761e058e007eedc6c003d0df749c2

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