Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93660cbf25209f9…

MALICIOUS

PDF

73.4 KB Created: 2021-02-24 16:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 3f31d29ada1217ff5337758b2b8bf009 SHA-1: 1da763151e4bf4113281afbc28e9033cc0b5b73e SHA-256: a93660cbf25209f95e695a241e607ccda3760cc05ed783db54ee26d787a3273b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to use SEO techniques for distributing harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://bologen.ru/wix?keyword=strip+natural+cleanser+fruit+punch PDF link annotation
    • http://gojavodevagajuw.mygamesonline.org/what_does_a_large_sweet_potato_look_like.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/eeii3ez/nimotuwigapovivapigu.pdfIn PDF document text
    • https://cdn.sqhk.co/dikulodut/hdjVLhf/76868629351.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/81458474308.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/jbjhShh/81893945006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_603542b25f0b4.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/quantum_field_theory_demystified_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417046/normal_600200032e984.pdfIn PDF document text
    • https://cdn.sqhk.co/netimupoxojo/geXBJqy/pesemuxitilev.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/HoWveic/farm_master_pedal_tractor.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/FhbNcgh/radiohead_songs_in_westworld.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/8hj1e3V/rejaro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabodegodonirad.atwebpages.com/60116242144.pdfIn PDF document text
    • http://livirava.atwebpages.com/behringer_xenyx_x1204usb_driver_windows_10.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_off0000d7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E5 5208 bytes
SHA-256: ff2a1866729f087c5582891dea8c68e25662013172b3015882da6ead478c75db
font_01_sfnt_off0000e991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 14796 bytes
SHA-256: 84aa23b10a5bc8d1f162eb8e75e45e81a6c98790824fc5901bc4bf4e58862de7

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