Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d61888ca613b365…

MALICIOUS

PDF

89.9 KB Created: 2021-05-23 22:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c58ebcdb5c11eec91839eca7c9de9f72 SHA-1: ec0c2e201b699b6a0af927402b29dd37b1ebf40d SHA-256: 6d61888ca613b3650b8a46de0b498a61e540087b706ea67127f7d2a241d23bcf
196 Risk Score

Malware Insights

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

The PDF contains a link farm and an SEO redirector, indicating a phishing or scam attempt. The embedded URL 'https://vilenefex.ru/strik?utm_term=how+much+does+black+and+white+printing+cost+at+fedex' is likely part of a social engineering lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to lead users to malicious content, potentially a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/strik?utm_term=how+much+does+black+and+white+printing+cost+at+fedex PDF link annotation
    • https://s3.amazonaws.com/goveruduzewoxu/nijikoxalatut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fdf96fa360fd.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/dupogalinevujatarixekiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473403/normal_5fe7a11256980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_60654bda6fbbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473916/normal_602255b59610a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_5fd6ac589febf.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/15886857662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503787/normal_605efa73c5316.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421051/normal_5ff4d2bf8cb1b.pdfIn PDF document text
    • https://foxenaduro.weebly.com/uploads/1/3/1/1/131164157/2f3d94e5620.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475719/normal_5fffc360ae679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449965/normal_605fb43310d05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476015/normal_5fce23a42ff21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472200/normal_605d960225884.pdfIn PDF document text
    • https://sirukume.weebly.com/uploads/1/3/0/8/130814715/2692839.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/31854728749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451756/normal_603a63a505fb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412768/normal_60320e75ec539.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ec0d3e7a-2f37-47c7-bddf-644f86a1f4c6/17031239834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd1dd74c-90c7-40bb-b703-b37b133f8c37/naruto_vs_bleach_vs_one_piece_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8e59539-325e-4ac3-8675-81dbd09af7aa/teaching_strategies_for_millennial_nursing_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/247bf086-8c5e-4184-9eb5-efae3ea649e3/how_old_do_you_have_to_be_to_be_a_mason.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001105d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105D 5776 bytes
SHA-256: 4d7c810a173347d2ffb2c53244bef9d0596c4acc8f3501aa2dec2e1437901c39
font_01_sfnt_off000123e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E4 11536 bytes
SHA-256: 4a5a2e3a4a717bcfc5e6f741b4638e6c3487e05788c4c3512669d08dc4fbda95
font_02_sfnt_off00014b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34