Malicious PDF — malware analysis report

Static analysis result for SHA-256 429beb5792895aa1…

MALICIOUS

PDF

82.5 KB Created: 2021-03-20 14:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9fc4a2ced939a75abfa94ca436068524 SHA-1: 21ce593071051349e0b5ff9cd6cfefd23aea6d4a SHA-256: 429beb5792895aa1542eacabe68d95442c6775eafe0c4971aad9ada1d1b48957
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://lozipotod.ru/strik?utm_term=g-shock+mr-g+mrg-g1000d-1adr+price PDF link annotation
    • https://kukaweferoba.weebly.com/uploads/1/3/4/7/134754127/tejukifu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469145/normal_5ff956a4a1a76.pdfIn PDF document text
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/6f048a.pdfIn PDF document text
    • http://bonifacy.site/87817653420p0crt.pdfIn PDF document text
    • http://e-devletodeme.net/rolikejozixijipu18nsm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410433/normal_6000c42f82ce9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403959/normal_602f473240a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_6043675a83d45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464715/normal_60192720d838c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5fd3c2820db7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_3a2fd8c74ef74a65b06856151aff19e8.pdf?index=trueIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_d71b3f1e088446aa912819c22bbcb5d5.pdf?index=trueIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_e87e1b474ab44ae296e36002b72977dc.pdf?index=trueIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_b91e71e6b2364954b2110104db6d611d.pdf?index=trueIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_104c00ad38254cee9f6443ad379b9a3a.pdf?index=trueIn PDF document text
    • https://4fbc56e1-d9a2-4996-be1d-38f9cd263936.filesusr.com/ugd/b1afee_7fa327958653485a98bcf9138614008f.pdf?index=trueIn PDF document text
    • https://ebbb41b5-b8b7-4bfc-9e1b-23e79ad93844.filesusr.com/ugd/5eba67_204f375a1fa44821ac5dfdb96655e094.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_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 5776 bytes
SHA-256: d6a17605702b1e05648fd0fef189f1af078b2f1b4a2c85573b8b306ec68dffe0
font_01_sfnt_off0001075b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075B 23516 bytes
SHA-256: 6a407e7d1a91dfc6f11c1f3a4e6fb024d0997a06c12885310bddbc863ee8d4ab

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