Malicious PDF — malware analysis report

Static analysis result for SHA-256 445bcb45480ee4a5…

MALICIOUS

PDF

76.8 KB Created: 2022-03-25 00:51:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 7e910b622c10643e55f1f2a3cd8c60c5 SHA-1: ae1d28c0479909ea280aeb2ef58a23aabe6fef10 SHA-256: 445bcb45480ee4a530f1e0ace09fc6bb7877e80b8262dde700839b8013b115d1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to malicious sites.

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.
  • 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://wirut.co.za/YmrXLWy8?keyword=my%20best%20friend%20dog%20grooming%20forest%20park PDF link annotation
    • https://remurefovedelag.weebly.com/uploads/1/3/1/8/131860204/nakugedujakim.pdfIn PDF document text
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/xobisenata-juwapisutevuf.pdfIn PDF document text
    • https://sedesafatowezu.weebly.com/uploads/1/3/1/4/131437285/6489487.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/ranejuti.pdfIn PDF document text
    • https://fukubumo.weebly.com/uploads/1/3/4/0/134016705/4981166.pdfIn PDF document text
    • https://kuzeloxowew.weebly.com/uploads/1/3/4/3/134330257/bazagira.pdfIn PDF document text
    • https://tuwubave.weebly.com/uploads/1/3/3/9/133997869/1645805.pdfIn PDF document text
    • https://wuxebejodivo.weebly.com/uploads/1/3/6/0/136030931/nivedegevefujonoziva.pdfIn PDF document text
    • https://puzapageduz.weebly.com/uploads/1/3/1/4/131453954/1104497.pdfIn PDF document text
    • https://rujikanonige.weebly.com/uploads/1/3/1/8/131872107/vumuvozodofet.pdfIn PDF document text
    • https://bevufivob.weebly.com/uploads/1/3/4/6/134669401/1359959.pdfIn PDF document text
    • https://naloguvobiwulup.weebly.com/uploads/1/3/1/1/131163976/kopawusedanodef-wimejevoxijamuf.pdfIn PDF document text
    • https://besaxujujugolu.weebly.com/uploads/1/3/0/7/130739491/6404684.pdfIn PDF document text
    • https://dapevorejux.weebly.com/uploads/1/3/4/6/134695165/2739233.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/fb280.pdfIn PDF document text
    • https://jovuximunises.weebly.com/uploads/1/3/0/8/130814448/cd8dcb403.pdfIn PDF document text
    • https://xavixevoke.weebly.com/uploads/1/3/4/5/134590279/mekamegebif.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E7 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0000db8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8B 11132 bytes
SHA-256: 5d51f9aea7ee45b2f761d625984d3c4d391ac3080aea3e94e537c908860b7cca
font_02_sfnt_off0000f527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 17880 bytes
SHA-256: c6c1369d8ac52ca31f4de6f5c586d49737dc4df56d6607f87a91f08438557fc1

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