Malicious PDF — malware analysis report

Static analysis result for SHA-256 7367f25c4c81719b…

MALICIOUS

PDF

73.6 KB Created: 2021-02-23 23:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 94ee29d67c8d4d2121f0ac31eb64fad3 SHA-1: 731b3c97fbda7aafcb6a507af2835a77b00b6a63 SHA-256: 7367f25c4c81719b8d08239d7b0f8e649bc43e06d5143b1254078e6c38ee022e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or malicious redirection attack.

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/aws?utm_term=what+do+solicitors+do+when+buying+a+new+build+house PDF link annotation
    • https://pibezenasa.weebly.com/uploads/1/3/1/4/131454503/duvobatutaba-faxaven-mamavasarib-gowavupevan.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/ihsiiie/lezakimoruregof.pdfIn PDF document text
    • https://cdn.sqhk.co/dederubap/qgfxhhP/73726374037.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/jbjfzia/tepimixonirixox.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/igiiZMV/19992226409.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzagile/KRib4he/95399607064.pdfIn PDF document text
    • https://cdn.sqhk.co/sofopiro/iahf2RB/dragon_hills_2_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/hcZrgeV/2862582930.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/h7pqJje/christmas_tree_cake_topper_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/Sic0jjD/59373365047.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/H1jhtjg/jilikuzuzunebofukirinavat.pdfIn PDF document text
    • https://cdn.sqhk.co/wojomisew/hjifnif/cover_fire_offline_shooting_games_gameplay.pdfIn PDF document text
    • https://gekiwudev.weebly.com/uploads/1/3/4/7/134769606/1309332.pdfIn PDF document text
    • https://nonovobuzodeku.weebly.com/uploads/1/3/5/3/135348203/rosexipifovogog-danodus.pdfIn PDF document text
    • https://nevofegef.weebly.com/uploads/1/3/4/8/134851200/zefiwejo.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/zuwosil/bollywood_movie_songs_free_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/argumentexception_absolute_path_information_is_required.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/14264555201.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/woperovowesewusi.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/coordinate_covalent_bonds_are_formed_by.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_off0000e1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BC 5548 bytes
SHA-256: ed4725feacce5ffedd89b0e64436b9f08f2482034548a291052c642b8f49e3d9
font_01_sfnt_off0000f4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 10568 bytes
SHA-256: a3f22276d760460ec7397ee4076ceca06064ac4863978d8a8ce144419ce78989

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