Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cac177f2d0ddaee…

MALICIOUS

PDF

67.6 KB Created: 2021-09-24 07:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4605d7861b7fc2e44b4005ff5e616016 SHA-1: 973477a7313df2721c3c87b36a8b66b2c61963f7 SHA-256: 9cac177f2d0ddaeeef4aadea2ced747c61de723f7be9df3d041a4116a4fb5685
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV. It contains numerous embedded URLs, with one heuristic specifically flagging it as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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://ggmtc.net/userfiles/files/46592546696.pdf In PDF document text
    • http://aurora-c.jp/files/files/43210452539.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/35140894119.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/zigavupujozoko.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/60881443959.pdfIn PDF document text
    • https://htchninc.com/d/files/vifeginomiwarineduxemika.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/90381279548.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/zojoxefetetobep.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/80055021064.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/zegomiredisa.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/sedetamezag.pdfIn PDF document text
    • http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/10965746296.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-9-6/20210906032401363429.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/24755545853.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/kowabevotirolutobel.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/zikilejurefagosipuxo.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/zonixekosegirukix.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/vetabosibafazori.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/47359822840.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/38617976047.pdfIn PDF document text
    • https://unchiulmihai.ro/files/fckeditor/file/47809797822.pdfIn PDF document text
    • http://vpsystem.com/files/fck/18749206646.pdfIn PDF document text
    • http://adec-interiors.net/Uploads/file/24766165058.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=bollywood+movies+apk+2018PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF352 11164 bytes
SHA-256: 3f12ee841a5fe399af35b0bc042f84ef9316e357d0510f66c4c06ea713001ea6

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