Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0e972d15f971ba…

MALICIOUS

PDF

78.1 KB Created: 2021-02-18 04:20:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 94dd6c79a40d6d42644459e03c0ed208 SHA-1: d9309425ddf2bfe523d3e8f4831a56a896507f18 SHA-256: 0b0e972d15f971ba6cf0d9c2a839a09d45f7853a338447a41d4d69ae17b305a3
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the PDF is part of a link farm on disposable hosting, reinforcing the malicious nature of the URLs.

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://seumenha.ru/strik?utm_term=what+is+the+main+purpose+of+sentencing+in+the+crime+control+model PDF link annotation
    • https://nidapekosoko.weebly.com/uploads/1/3/2/7/132740606/1533959.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/djf02gj/32361511151.pdfIn PDF document text
    • http://nekretnine.site/xumegukjv9za.pdfIn PDF document text
    • http://com-signto2.xyz/ejemplos_de_aposicionlvofm.pdfIn PDF document text
    • http://vkrowl.com/505240190211wqnp.pdfIn PDF document text
    • https://cdn.sqhk.co/bikawegaj/7vhiii8/23391818371.pdfIn PDF document text
    • http://haifaiv.ru/craftguide_mod_1._6_4wlndr.pdfIn PDF document text
    • https://cdn.sqhk.co/woguwubege/ijBZI0h/sniper_3d_shooter_hack_game_download.pdfIn PDF document text
    • http://fastpysystem.online/togu_challenge_disc_2._04h8r3.pdfIn PDF document text
    • https://judavolegarar.weebly.com/uploads/1/3/1/8/131871921/fovaro.pdfIn PDF document text
    • https://tapidokebijimub.weebly.com/uploads/1/3/4/5/134577153/c1c26db628.pdfIn PDF document text
    • https://cdn.sqhk.co/namulofilox/jgtqhdB/60681673785.pdfIn PDF document text
    • http://povar2020.site/89270485200sz0al.pdfIn PDF document text
    • https://xutareziwax.weebly.com/uploads/1/3/5/3/135327408/adcce8e36d.pdfIn PDF document text
    • http://nexusisuperat.22web.org/why_did_humphry_davy_invent_the_lightbulb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mosakokomu.epizy.com/a_level_biology_summary_notes.pdfIn PDF document text
    • http://buwijakuwomem.rf.gd/76546768454.pdfIn PDF document text
    • http://gogewafusa.rf.gd/46536283347.pdfIn PDF document text
    • http://mivazofirogo.epizy.com/lujojovivipepufodifoka.pdfIn PDF document text
    • http://ramawotinejog.epizy.com/flame_test_lab_analysis_questions_answers.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_off0000f203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF203 5580 bytes
SHA-256: 0afc77491d2a58630c3bdf3a3ca3f7d60e73b8e28696e6478e80fc8bd5760cfb
font_01_sfnt_off000104de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DE 10888 bytes
SHA-256: 242a0cbd105f91407ca10c4edd5a8353413dfe453b2a36a2821d738b6718f207

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