Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c94cbcbf28886d0…

MALICIOUS

PDF

80.2 KB Created: 2021-05-25 17:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 41727259a277a39acd8586d6ed6cdb67 SHA-1: ec82ee75547bc632ff109dde95b2d8fec6c4c46a SHA-256: 3c94cbcbf28886d035abf1dd0ea2080af8f19420d53e0c848671598681ca7503
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing sites, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary malicious URL identified is https://lozipotod.ru/strik, which is likely used to host malicious content or redirect to a phishing page. ClamAV and ML classifiers also flagged this PDF as malicious, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://lozipotod.ru/strik?utm_term=rhode+gear+bike+rack+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457854/normal_5ff318bb7172f.pdfIn PDF document text
    • https://wedidosav.weebly.com/uploads/1/3/1/6/131637371/masenipizede.pdfIn PDF document text
    • https://butadopol.weebly.com/uploads/1/3/1/3/131378795/robidujofige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_601833f2ad485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_603527c21f155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423715/normal_606a08c02b799.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371508/normal_5ff53f2f90e72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414689/normal_606e6b3a5d30a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fedaef7cf403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_604d031da728f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5fd0dcbf1e0ac.pdfIn PDF document text
    • https://gorokawuse.weebly.com/uploads/1/3/4/4/134489158/milatumufukew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445558/normal_602f565291213.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413850/normal_6000e47077f5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_605a18501fd22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453579/normal_5fd7a7260a5d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455387/normal_5fefeba7d16b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_60617ca56965b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_600ddd00d96a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476127/normal_5fe495e3a27eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/120825bd-55a3-46e9-be72-cc57f17e9b6f/minn_kota_riptide_ulterra_80_w_ipilot_link__bluetooth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04433a90-f7a4-42fd-8475-b4371a139fb7/70769607405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/103904c7-5857-422f-81d2-df6af12c423a/sig_p226_vs_glock_19_gen_4.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_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 5604 bytes
SHA-256: b60e51f5979a2abd8c8ece7cade6c3b007b7ecf8292c088c55b1dcf50406dab9
font_01_sfnt_off00010e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E32 10836 bytes
SHA-256: 179d59778ec94216d909da1bc5cf04a6386bb25f0dd365c4d59b9fb5820ccdca

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