Malicious PDF — malware analysis report

Static analysis result for SHA-256 186bd5a595d3ba65…

MALICIOUS

PDF

96.7 KB Created: 2021-03-01 21:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 86245f24f3c704982014e1507a7c84ba SHA-1: 6bd740f7dc55d69aab0f2dcf68c899e5191bc0bd SHA-256: 186bd5a595d3ba65b4a05cd750b61bd53f2b83e7a09e3283eab63bf96cc66eb9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, which is characteristic of SEO link farms or phishing lures. ClamAV detected this file as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://vilenefex.ru/wix?keyword=good+bill+ideas+for+youth+and+government PDF link annotation
    • http://xamoxipuwizutux.scienceontheweb.net/beats_solo_pro_over-ear_wireless_bluetooth_headphones.pdfIn PDF document text
    • https://zoxanomo.weebly.com/uploads/1/3/1/1/131163640/6508348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_600df77f7ce47.pdfIn PDF document text
    • https://bopamoverera.weebly.com/uploads/1/3/1/4/131408256/dd9be.pdfIn PDF document text
    • https://mesubepivugegej.weebly.com/uploads/1/3/2/6/132682347/61cea53f2.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/what_is_meant_by_digital_communication.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446036/normal_5ff13b4b3963e.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/80604020701.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369657/normal_5fdd62a566c45.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/zasaperulonodaji.pdfIn PDF document text
    • https://dutosagow.weebly.com/uploads/1/3/0/7/130775111/1333178.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/kewebuvur.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/7031966.pdfIn PDF document text
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/nopeletazag_sofudijatof_kuneju_dazemurigazo.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/how_to_draw_a_cat_in_a_box.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/1st_grade_math_worksheets_word_problems.pdfIn PDF document text
    • https://bokowamimufap.weebly.com/uploads/1/3/2/7/132712050/zesumodajadofen-gezumosubalupe-xovipi.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/how_to_learn_graphic_design_at_home_in_hindi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rodedewezijore.atwebpages.com/how_to_get_moca_certified.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/nasowemesu.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_off00013ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA3 5656 bytes
SHA-256: 184d0367f6c20207b71d4d76c7a3c0eca387bd9d9545b59eaf195859a8fe83fb
font_01_sfnt_off00014fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC1 10848 bytes
SHA-256: 8694505b3212aadcfa17452e0898ac13f48b18b8976fca2dec410b858f718012

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