Malicious PDF — malware analysis report

Static analysis result for SHA-256 998144f9c0e0feaf…

MALICIOUS

PDF

76.3 KB Created: 2021-02-25 21:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: fe12160419c9bc29d0078cfe3c5deba9 SHA-1: d8cc35ca80c6ff4574fedecbb0c26f23bcfa67a9 SHA-256: 998144f9c0e0feafc30552e8737dc825d9fa4443a9ee3e9976d5d82a9c6e0a75
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically referencing an 'award' and a search query, suggesting a phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to disposable hosting, reinforcing the malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://leonvi.ru/award?keyword=who+is+the+poorest+person+in+earth PDF link annotation
    • https://cdn.sqhk.co/jojojidatun/digdvxM/adventureland_oktoberfest_2020_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445550/normal_602466bb626b6.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/whirlpool_gold_quiet_partner_iii_how_to_clean_filter.pdfIn PDF document text
    • http://bigafoporake.22web.org/37458472518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_602938d011270.pdfIn PDF document text
    • https://cdn.sqhk.co/melukate/fLgcRjd/esr_endless_street_races.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/cibCVig/game_capture_for_mac_obs.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/2002_mercedes_e320_service_b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_602452cf691c0.pdfIn PDF document text
    • http://mnatural.space/35217046822zb1e0.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/degugoboroxupadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_600bca17f23a1.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/ghasidQ/rofimewulo.pdfIn PDF document text
    • http://pufonorigaji.22web.org/bitzer_software_6._7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454670/normal_5ff597dc4420f.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/fixararololu/bleacher_report_ncaa_football_predictions_week_2.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/how_to_make_mead_like_a_viking.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/crystal_report_totext_too_many_arguments.pdfIn 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_off0000f757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF757 4888 bytes
SHA-256: 900764c701a781c8a57acf974251397ef0650ca6b0c91a085e6adb9550d87212
font_01_sfnt_off000107fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FB 10368 bytes
SHA-256: 8085d802f4ba9755c0d9d1fe624a479fed32c801a9f50bdcc2c188e4656a5659

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