Malicious PDF — malware analysis report

Static analysis result for SHA-256 730ee3299158bb5a…

MALICIOUS

PDF

82.8 KB Created: 2021-02-27 06:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6a6755762222af530a6681e38f357755 SHA-1: 022dd7fe4abb61faee46391a50db201350bf52a1 SHA-256: 730ee3299158bb5ad07bf886d336b5d5afb0480477a21f5a5ee55123f02b84a0
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs disguised as a book synopsis, a common lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farm heuristics further support the classification as a malicious document designed to redirect users to potentially harmful sites.

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/strik?utm_term=the+trials+of+apollo+book+2+synopsis PDF link annotation
    • http://disclosures.space/chernobyl_netflix_episode_guidel8v9b.pdfIn PDF document text
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/1c81a89a.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/i7gjYV9/kajawatokikowenemikom.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/gimotozi.pdfIn PDF document text
    • http://nutristrike-shop.ru/which_blood_pressure_monitor_is_best_in_canadamqw3w.pdfIn PDF document text
    • http://omerkatanalp.com/388515407302nf2m.pdfIn PDF document text
    • https://tazusovekofuwaj.weebly.com/uploads/1/3/5/9/135969448/bd463a8447.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/g7D9IWT/penalty_kicks_from_fifa_94_to_20.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/dtRhdjd/kung_fu_techniques_with_pictures.pdfIn PDF document text
    • https://fularoxu.weebly.com/uploads/1/3/1/4/131452806/42d349a6d1.pdfIn PDF document text
    • http://blaugrana.ru/bible_quotes_book_of_matthew7678j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10909 5376 bytes
SHA-256: b859201245adc3c5922c32a2df89bfce9311ce10be780196933e9bbcdc76447c
font_01_sfnt_off00011b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4C 10368 bytes
SHA-256: 89e426a45c7bd8d5ca81abbce086d1d68b85bee92788fdf2bb8a9bd6f734a55f

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