Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9c03fcb7be8df3…

MALICIOUS

PDF

78.9 KB Created: 2021-05-15 22:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dbc41ef6c13eed304b6c66b47e6098c4 SHA-1: b04d54155948df3e578fe2020385aca022b390c5 SHA-256: 2d9c03fcb7be8df36a62d93565fcc5219562ed6d7e57c7fc6591eefcc8730f1a
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to what appears to be an SEO link farm designed to redirect users. The primary malicious URL identified is https://jumiwimov.ru/strik, which is likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jumiwimov.ru/strik?utm_term=what%2527s+the+difference+between+dapple+and+piebald PDF link annotation
    • https://s3.amazonaws.com/nosepevozux/correct_address_format_usa.pdfIn PDF document text
    • https://gesaseli.weebly.com/uploads/1/3/1/3/131379828/2352044.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/987750973.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/fagabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404730/normal_600a662f806cc.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/musolelakekelilevav.pdfIn PDF document text
    • http://rojibitakuvekuw.scienceontheweb.net/captopril_dosis.pdfIn PDF document text
    • https://niwosegebopusa.weebly.com/uploads/1/3/4/5/134583118/0777ce1bac.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/php_for_the_world_wide_web_conference.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/85295881848.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/57186578332.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/how_do_i_connect_my_canon_mg2922_to_wifi.pdfIn PDF document text
    • https://fulitadu.weebly.com/uploads/1/3/4/8/134863398/kevumukinas.pdfIn PDF document text
    • https://pigunakates.weebly.com/uploads/1/3/4/6/134628742/8941276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_603bdb5597317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488141/normal_6011ace62dad3.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/canning_vale_college_uniform.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419193/normal_5fd721bd1dbc8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kusababi.onlinewebshop.net/femabutanadedefurif.pdfIn PDF document text
    • https://a8a57b57-a5e9-4b5c-b824-02731ce3a1bd.filesusr.com/ugd/cfa667_5f57b22387324f86b0414b4a0861d54c.pdf?index=trueIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_56bbb5170d7449a580d40a9bdc740ffe.pdf?index=trueIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_d1f58ba8ec794cbe84e2d3f399971140.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_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 5524 bytes
SHA-256: e4ed10d2ad63d4fb9f0e5d2c59e11e5f3e400625f7b85ca58fc7b41b3c75492b
font_01_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 11484 bytes
SHA-256: e9919f306e2b800780c5c3846043bc17884338af2b494c74302661729deaf404