Malicious PDF — malware analysis report

Static analysis result for SHA-256 91adf980b62a4b98…

MALICIOUS

PDF

73.7 KB Created: 2021-03-02 13:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 825289701409cd77e2b035754d0bc31a SHA-1: 3c8f3a3874705aa343826bf50993d5b363d1ac9c SHA-256: 91adf980b62a4b9817183f2b6049122f3f4a03c85fd9d5a838d675e251a62bbc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, with several pointing to disposable hosting and potentially malicious domains, suggesting an attempt to redirect users to phishing or malware download sites. The document body, though heavily obfuscated, appears to be a lure related to technical diagrams, aligning with the phishing intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/award?keyword=craftsman+7+1%252F4+circular+saw+parts+diagram PDF link annotation
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/2696a.pdfIn PDF document text
    • https://fagoloda.weebly.com/uploads/1/3/4/6/134649735/89e3737816700.pdfIn PDF document text
    • http://chatik85939775.fun/canon_mf4450_scanner_toolbox719f7.pdfIn PDF document text
    • http://artistichomesolutions.com/jukuzafugikanefhcafa.pdfIn PDF document text
    • http://world-wild-shop.com/happy_birthday_cake_design_wallpaperev87h.pdfIn PDF document text
    • https://pagazamis.weebly.com/uploads/1/3/5/3/135310118/xupusuvujakerukupax.pdfIn PDF document text
    • http://idealica-ituficiale.website/everythings_gonna_be_alright_meaning_in_urdulm786.pdfIn PDF document text
    • https://gimepokik.weebly.com/uploads/1/3/1/6/131636980/lesoxunuxobe.pdfIn PDF document text
    • http://delayikapy.xyz/patevosu4adae.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/wills_eye_near_me3b9ks.pdfIn PDF document text
    • https://nozugaxuxanukuj.weebly.com/uploads/1/3/0/8/130813784/mezimajugeluv.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/venunamazozuzo/zizodebijinefebizir.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/faxeseporo.pdfIn PDF document text
    • http://tadidemoribezor.epizy.com/97355611791.pdfIn PDF document text
    • http://mogazijanadoro.rf.gd/7679240547.pdfIn PDF document text
    • http://zonuzaxesinok.rf.gd/fotav.pdfIn PDF document text
    • http://refesare.epizy.com/pioneer_vsx-522_service_manual.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_off0000db06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB06 5728 bytes
SHA-256: c2f415d24d904ddbfb64c048acff682f1c34f2be5249fc0124ca7b4b786146ed
font_01_sfnt_off0000eea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA7 13420 bytes
SHA-256: 88798c17a190035a220c63b2dda9d9bf51ca66644a62d0097e674bb0b9308cf2

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