Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd9553d932037ad…

MALICIOUS

PDF

62.6 KB Created: 2020-12-19 13:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82e95879c4f4f7023a530cf22ec636e6 SHA-1: 1bb79755a992324a044144ce1aa111d583b2278f SHA-256: 6bd9553d932037ad0ba04627b33bedb0110cf38f19061d2aead3d965526df42a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains metadata related to PDF generation and potentially misleading titles, further supporting the lure. No scripts were extracted, but the numerous external links are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/strik?utm_term=the+third+eye+pdf+sophia+stewart+pdf+download
    • https://rapokivagifo.weebly.com/uploads/1/3/4/3/134338569/771262.pdf
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/3f28a38fe7861f8.pdf
    • https://cdn-cms.f-static.net/uploads/4384831/normal_5f9267b665032.pdf
    • https://kexoxuneve.weebly.com/uploads/1/3/4/5/134501441/xurozakuzisiwa_pabazorudogevaw_nirudutoxe_vivumerevusir.pdf
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5f8e41fe10507.pdf
    • https://cdn-cms.f-static.net/uploads/4418171/normal_5f9931a8bc347.pdf
    • https://cdn-cms.f-static.net/uploads/4372076/normal_5fa59effc6cc9.pdf
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5fa7304a57bbc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f2172c22-e0e8-498a-b01f-64ad89628dac/how_to_reset_a_google_home_mini.pdf
    • https://s3.amazonaws.com/tikofaketonub/jopixigirov.pdf
    • https://uploads.strikinglycdn.com/files/50cc4998-4430-4287-a732-7791b25bba66/23602544777.pdf
    • https://s3.amazonaws.com/wopari/59198283450.pdf
    • https://s3.amazonaws.com/ditiruz/comparing_3_digit_numbers_worksheets_2nd_grade.pdf
    • https://s3.amazonaws.com/bisiku/c_e_t_karnataka_2019_key_answer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba96.bin
d3a04fe31c264a024c49f1ba6bc7abaf3f4e6f17ffa0c202476f405d396ee912
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA96 5272 bytes
font_01_sfnt_off0000cc95.bin
cd775c32c448a8b354cd2f0cdc1d569eb9c4a340468bd7f15a3a092f24b0eb15
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC95 9608 bytes