Malicious PDF — malware analysis report

Static analysis result for SHA-256 1363be1ba23a8a62…

MALICIOUS

PDF

62.1 KB Created: 2021-01-09 17:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 86c883bf552e028a1ab00f1eece7c800 SHA-1: 55ffc3a05806bce646b5a8a75a3fce3fde5a0b21 SHA-256: 1363be1ba23a8a6226fd8402c69b08000d14a960191170e635c07e06114dac75
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing malware. The embedded URLs suggest a tactic to lure users to external sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://trafftec.ru/aws?utm_term=it+chapter+2+pennywise+true+form PDF link annotation
    • https://dumugukof.weebly.com/uploads/1/3/4/6/134647937/jenosefepugejoxoxe.pdfIn PDF document text
    • https://wowutelugige.weebly.com/uploads/1/3/4/3/134359508/kesifitukakuke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390068/normal_5fca807acf18c.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/tagabimubesata.pdfIn PDF document text
    • https://nujodobenume.weebly.com/uploads/1/3/4/4/134441993/vusofiwa.pdfIn PDF document text
    • https://xixunogada.weebly.com/uploads/1/3/4/3/134343035/firibamasizosi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370533/normal_5fc3ecce4731a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405650/normal_5fa6dca700d00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403130/normal_5fc4eb765786a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f890a8cea81c.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/remufuzu/zojofijemelumirone.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/divozatabomupilafenotuza.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_off0000b64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB64D 5484 bytes
SHA-256: 3ce97720c88b26078790aed7042dd69037c16854dc65607ae0ba077361a21a3e
font_01_sfnt_off0000c8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EC 10228 bytes
SHA-256: 0965decce2f2277130a89bf2f870ca35f80930d8939a0b24e26febf80e783af2

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