Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f96fac40cad8b4a…

MALICIOUS

PDF

89.3 KB Created: 2021-03-14 17:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c4ba92b612df9c0a7127b029d721d945 SHA-1: bf87cfae33fd0d2253689142e9f18570adde65cb SHA-256: 0f96fac40cad8b4ad172e67aa05bab090714b7ca5c898cb58da839c90c836157
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing lure disguised as a worksheet answer key.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/wix?keyword=solving+systems+by+substitution+worksheet+answer+key PDF link annotation
    • http://ridunculus.com/james_stewart_calculus_6th_edition_solutions8kf5r.pdfIn PDF document text
    • https://cdn.sqhk.co/nazujovo/dg5icgh/43698760103.pdfIn PDF document text
    • http://testertumentum.space/2015_dodge_challenger_user_manualxdqdb.pdfIn PDF document text
    • http://islemleriniz.org/lenovo_ideapad_duet_chromebook_za6f_128gbj3h8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496380/normal_602b789536060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384325/normal_5fe53e5b7f9a8.pdfIn PDF document text
    • http://ketotreno.buzz/30611242485y72pi.pdfIn PDF document text
    • http://fruit-ita.fun/canon_lide_120_scanner_user_manualolxar.pdfIn PDF document text
    • http://sandiego-podcasts.com/afterlight_mod_apk_latest9nyj4.pdfIn PDF document text
    • http://nasty666.space/what_does_the_bible_say_about_false_hairg8fh5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467581/normal_604c970d66c96.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/college_comparison_spreadsheetkxom5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5fd97db8e43be.pdfIn PDF document text
    • http://garant-ritual.online/monopoly_gamer_mario_kart_instruccionestevi4.pdfIn PDF document text
    • http://voicebftyi.com/judivakaweroketukejammkiy.pdfIn PDF document text
    • http://bonboxstudio.com/kuwidepofirerugslqvl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_601a88010e35c.pdfIn PDF document text
    • http://waystep.site/fitivalunamalizuvedanuevvnv.pdfIn PDF document text
    • http://instasurprise.online/91006214174ab200.pdfIn PDF document text
    • https://cdn.sqhk.co/fasisela/ghijhG9/tawulike.pdfIn PDF document text
    • http://honey-love.ru/95349206556nk1tn.pdfIn PDF document text
    • https://cdn.sqhk.co/tatomaxeriri/XJJFgff/xcom_enemy_within_android_controller_support.pdfIn PDF document text
    • http://50offstore.info/iomega_home_media_network_hard_drive_windows_10yvy0g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11925 5660 bytes
SHA-256: 514d400085459993395ac35157cd22196d4a0bb57992bc4c0a864b3bc8a52c18
font_01_sfnt_off00012c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C55 12500 bytes
SHA-256: bda342899f682efca1b02998538d1f63062be0f70632a571e10058bebc1a60c6