Malicious PDF — malware analysis report

Static analysis result for SHA-256 efbabd3cc430e69b…

MALICIOUS

PDF

72.8 KB Created: 2021-02-26 11:10:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: e7f745097089ed79b8044f5f8e739538 SHA-1: 249def44eb30e206588ce624900ba7081a40d439 SHA-256: efbabd3cc430e69b2568f2bf8aaf28b2f3e34fad768ba02f66ef7686c4ae17eb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one pointing to 'https://maypoin.ru/award?keyword=stopping+by+woods+on+a+snowy+evening'. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://maypoin.ru/award?keyword=stopping+by+woods+on+a+snowy+evening PDF link annotation
    • https://cdn.sqhk.co/lozuzupadis/Ngejc3Y/common_to_do_list_items.pdfIn PDF document text
    • https://jamekefexufi.weebly.com/uploads/1/3/4/8/134866820/790ed9d.pdfIn PDF document text
    • http://saratov.ooo/vivekizosuworivewupqyk1k.pdfIn PDF document text
    • http://autobaff.xyz/81885352975jqofu.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzexesetaba/BOij4hd/las_vegas_national_golf_course_history.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/Nhh2jim/wuvofokeverez.pdfIn PDF document text
    • https://cdn.sqhk.co/gidagolusi/jgfnTA7/sobuga.pdfIn PDF document text
    • http://chaptejvxz.fun/does_friedrich_nietzsche_believe_in_godukcav.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/hdxujeZ/likijefinixuvedapolipogop.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/fekaduvopigab/hola_unblocker_chrome_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/29883073040.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/ascus_formation_in_ascomycota.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/operaciones_combinadas_con_fracciones_y_decimales_ejercicios_resueltos.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/paburubuxolipobutakonepo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/kirik_party_movie_belageddu_song_ringtone.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_off0000e0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AA 5496 bytes
SHA-256: 3eb9391538724d63dba096860a5a7511951f40c06ab6907ec15fe2fecddfe629
font_01_sfnt_off0000f383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF383 10240 bytes
SHA-256: 1003d15da56d34c469b749a88ad3eef8bc0b0e8baffe245731cc529ac95c0981

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