Malicious PDF — malware analysis report

Static analysis result for SHA-256 f964940ff5c4621c…

MALICIOUS

PDF

81.1 KB Created: 2021-09-19 08:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e9c1405e3ec92645961872cf4407492c SHA-1: 105628b74b4af18e6f12b384de8338ab813f679e SHA-256: f964940ff5c4621c08a0789bd2291dac308f7a0a8a757339cae0199a751196e3
124 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that point to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies this pattern. While no scripts were extracted, the structure and URL distribution strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6000

Heuristics 4

  • 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
  • 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 http://ippinnudon.com/uploads/files/89833705430.pdf In PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b6ee89c71---95115289433.pdfIn PDF document text
    • http://ipea.kr/userData/board/file/xixovufalutitasakimimew.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/lapajiwuxe.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/41417022301.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/jivukedizereruzulopujewap.pdfIn PDF document text
    • http://knuhpharm.kr/userfiles/file/20210912035554.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/19026726640.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161327be8e7d04---7452751761.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/dixuxinijabuwigudeda.pdfIn PDF document text
    • http://fruitvita.com/files/files/vizirekitelumekidamibaxat.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/mapusemilazifimef.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/35649087482.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/70516563182.pdfIn PDF document text
    • http://cobmedia.hu/include/31101532877.pdfIn PDF document text
    • http://polaryachtmanufactory.com/res/wysiwyg/file/gakugoxapemaxokevuvid.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/xomovevevomisubinidogemox.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/ravixusubenagawexakotozer.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/41727638313.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/lujezaza.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/rafomomivevonesamesog.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/17698134331.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/nituxagagikusexagipejiw.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/sasabamewokesu.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/sesazifu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=pixel+dungeon+crawlerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD62 10568 bytes
SHA-256: 12d8db10d84ac99db7655bb841314266a20f0e46957d39e0e44419d04bf8a60e
font_02_sfnt_off0001156c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156C 18616 bytes
SHA-256: 5c63c2acadaafca7ec91231fe9768f733be5a1df446bee95df3161ac5bd7071e

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