Malicious PDF — malware analysis report

Static analysis result for SHA-256 f781774b85514225…

MALICIOUS

PDF

68.1 KB Created: 2021-02-24 17:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 0b5d3feb9f362ace17d9e9b343ee4584 SHA-1: 07994fd5edce9c92f36eeaeb437bf7b097f8feb5 SHA-256: f781774b85514225dc295f3c82381196534b995e36276c34d9da9a55fdae24e0
184 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 significant number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver a phishing payload or exploit. The presence of multiple PDF links suggests an attempt to distribute further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8462

Heuristics 5

  • 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
  • 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://baarspo.ru/award?keyword=should+internet+be+capitalized PDF link annotation
    • https://cdn.sqhk.co/takejirasomu/aicYGje/download_game_lady_popular_fashion_arena_mod_apk.pdfIn PDF document text
    • https://nifisutabunus.weebly.com/uploads/1/3/4/6/134634245/2977293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5fd9b0d1b0517.pdfIn PDF document text
    • https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/5631965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463830/normal_60293c1413831.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/fejivinexososoraw.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/43e5c.pdfIn PDF document text
    • https://sudejewakigalo.weebly.com/uploads/1/3/4/0/134040490/2314763.pdfIn PDF document text
    • https://fitabidik.weebly.com/uploads/1/3/0/7/130776693/bosilukegeti-tedepegizuxajus.pdfIn PDF document text
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/a52485a577404.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381321/normal_5fd05ba911f62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fcb6d5c804b1.pdfIn PDF document text
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/betaxokulivebupafage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377674/normal_5fc77502dab7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480387/normal_5fcd33c3c7ef9.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/jojitagifuva/bactrim_pediatric_dosing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/21499216673.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/14109321773.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 5276 bytes
SHA-256: f354be4d28f1baa035880de764f668c8cbe71af4529849c9db7c977b7fe02e84

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