Malicious PDF — malware analysis report

Static analysis result for SHA-256 445a4cfd4f3e975b…

MALICIOUS

PDF

74.8 KB Created: 2021-02-09 07:09:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 67dc996a316cec133f8828538ef407b4 SHA-1: e86a1423faa5e47fcefb049706b651e8a62019cc SHA-256: 445a4cfd4f3e975bdc6bf46211b02dc3736db7ec911a5c54a679a8616834688f
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to a redirector URL designed to host SEO-optimized content. This behavior, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution attempt. The primary lure appears to be related to downloading video software, indicated by the URL keywords.

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.
  • 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://jacksth.ru/wb?keyword=vidmate%20%20full%20hd%20video PDF link annotation
    • https://luzenesezenobo.weebly.com/uploads/1/3/5/3/135307250/puxolosoxebofebigine.pdfIn PDF document text
    • https://wevejabunom.weebly.com/uploads/1/3/1/4/131406075/doxomaduxejebe-nuwaruzewitupaw-naxalozakube.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/162952d4144.pdfIn PDF document text
    • https://vinetiwufo.weebly.com/uploads/1/3/5/3/135305890/5f226004bf.pdfIn PDF document text
    • https://lotekine.weebly.com/uploads/1/3/1/3/131381428/530112.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384642/normal_5fc830ca20bcd.pdfIn PDF document text
    • https://bujopulima.weebly.com/uploads/1/3/3/9/133997272/noliru_gikazodo_relekona_rufub.pdfIn PDF document text
    • https://tuwavufubuxa.weebly.com/uploads/1/3/3/9/133997694/92b987f.pdfIn PDF document text
    • https://tuwopabawebude.weebly.com/uploads/1/3/1/3/131382790/sofojesopavexub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427514/normal_6000ca7e5a114.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/97dd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/16037389252.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/favawemar.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/bully_lite_v4_apk_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/nibopatamos.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/bachianas_brasileiras_no._5.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/beloderolisurixipadu.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/information_synonyme_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/96324173057.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_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 4896 bytes
SHA-256: e2f31de2ffa003aa894e7c85054704c1073bd0b6b7a55b789890660e070323e4
font_01_sfnt_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 10240 bytes
SHA-256: 6e9acb3e0cde1f81dc75bfdc9b3291008fb1bb326f6601cedc6dfd07d241928f

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