Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0cd0870e15e876…

MALICIOUS

PDF

71.8 KB Created: 2021-04-28 20:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cd1311a681f197a6efcd78e6e092b40 SHA-1: b5b45724cdb6824a91b2b67663c07ce611b19f61 SHA-256: 2a0cd0870e15e8762c146e41e51e3a5b59881f263a63082a2584e757081bbe49
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous external URLs, including one pointing to zajinet.ru, suggesting a phishing or SEO spam campaign. The document body, though partially corrupted, indicates a search query related to 'Honda gcv160 service parts', reinforcing the lure. No scripts were extracted, but the overall structure and heuristic firings strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=honda+gcv160+service+parts
    • https://gosopitodemeku.weebly.com/uploads/1/3/4/8/134874694/6185737.pdf
    • https://molukubiluvu.weebly.com/uploads/1/3/1/4/131453067/268877.pdf
    • https://cdn.sqhk.co/kewukapugino/ejdgfge/kuxerazevedenokenedu.pdf
    • https://pegofugetil.weebly.com/uploads/1/3/5/3/135347090/9dff77fadc87018.pdf
    • https://dipibuwedaji.weebly.com/uploads/1/3/5/2/135293441/pimozes.pdf
    • https://cdn.sqhk.co/ruwonumatag/hhidujf/voice_recorder_app_download.pdf
    • https://ruweveti.weebly.com/uploads/1/3/1/3/131379789/9070d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_f2c6eef7ad864d41ab118dea6bc4f59a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3bb02673-95a4-4d9e-a433-287871e8b5f4/50107368893.pdf
    • https://s3.amazonaws.com/tugafebip/dofupegifusapa.pdf
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_6510743696d1463caec8f3e1c435c262.pdf?index=true
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_b49d1b800af04db6b82eb2337eb650d6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/33703238-03cf-4223-a4e5-72dd4a0003c0/53207469470.pdf
    • https://uploads.strikinglycdn.com/files/8532f66e-f5af-4a7f-b76b-cc40eecf638f/kenmore_300_series_washer.pdf
    • https://s3.amazonaws.com/kisimujuk/43340852356.pdf
    • https://uploads.strikinglycdn.com/files/19290983-0859-44b7-93dd-ad96101f486b/what_blood_type_b_positive_should_eat.pdf
    • https://62dace35-232c-43a2-b3e8-6cf19ad57148.filesusr.com/ugd/42ae31_19cd2f57ce394b478c7b442322db51db.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eacbec2f-1bc2-4d16-bcf1-ec8e00cf5ee0/brian_tracy_goal_setting_guide.pdf
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_e4659a56aca54f6d819862e6b34663d9.pdf?index=true
    • 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_off0000d907.bin
cee74362095d5ea9b56b40cc25f10eca9d976fd645a2261e941945005c15e2fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD907 5576 bytes
font_01_sfnt_off0000ec19.bin
6d672879077a3102624978ed66b11a27cafb4b63ccb4f437f7d51e8fd6fa99b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC19 10980 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.