Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa81c540f03f7376…

MALICIOUS

PDF

67.7 KB Created: 2020-12-11 17:55:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-07
MD5: 762927721e7e5c5b4b91f7d76ad90347 SHA-1: 4463fd39fdab2300fb8f1d37301e2f75878e3898 SHA-256: aa81c540f03f737623172fedad6d6d476b4e0ff106c975b8be692ceb0b491cbb
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?utm_term=ecology+practice+worksheet PDF link annotation
    • https://nigikejogu.weebly.com/uploads/1/3/4/9/134902550/006b8de547668.pdfIn PDF document text
    • https://merigufut.weebly.com/uploads/1/3/4/3/134357701/vulogo_xufape_taperobugud.pdfIn PDF document text
    • https://guzifako.weebly.com/uploads/1/3/4/0/134096492/lunotom.pdfIn PDF document text
    • https://rewumakabaw.weebly.com/uploads/1/3/4/8/134856880/wobok.pdfIn PDF document text
    • https://zizevazemob.weebly.com/uploads/1/3/4/7/134716229/06c165c6817.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/251178.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/femogiwogewitejufo.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://static1.squarespace.com/static/5fc0cc6dc14dfd36fef0f123/t/5fc0e2169d79364840adff81/1606476311097/budunolenosemamipo.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/fimuxexavudisupinorava.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/49269626169.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ba3b0a2757459be1f9cb/t/5fc51949eaf37e3b643ed41a/1606752585991/laxovonuvip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc540ed88c99b6d37c3f32a/t/5fce539ce43f2b00a8d99805/1607357340277/island_of_the_blue_dolphins_summary_chapter_3.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/fabipamofis.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/low_back_pain_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/gedabomigukiseva.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_off0000bc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC4C 5092 bytes
SHA-256: e0bc3a2a4df1521060bfe001f9339da4fe0a92ea042e81331d8da057f3f56cc4
font_01_sfnt_off0000cdc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC9 10868 bytes
SHA-256: 296c289130e5dd478d7faa7526a54caff9e7916f7ade3834818e00d7f0f56bdb
font_02_sfnt_off0000f28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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