Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ef56c5386b01bb…

MALICIOUS

PDF

77.0 KB Created: 2021-07-03 09:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43e3ad47bf33e1c0ada85ad9f1da6a0b SHA-1: 880af48185e1012c34e51433d5f908539491849d SHA-256: 95ef56c5386b01bb26228936160e1c56e8778a4879b34dab96e45b829f7e82f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://angkoronetour.com/userfiles/file/97701885125.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3747370c43---93082282955.pdf
    • http://richmediahouse.com/admin/uploads/file/71900799179.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609757a0bf38b---vagiwabepodojalozupine.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16070efb22d77f---daninisararusaxat.pdf
    • http://robwalker.net/fckupload/file/midowixagubebizunen.pdf
    • http://mulroyenvironmental.ie/userfiles/file/36290052635.pdf
    • http://gptools.net/userfiles/file/buwutibadobitiw.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/71e0cd131472da9bed2e5de59d494cf1/jinijeliremizomunafisilu.pdf
    • http://www.puhito.hu/uploads/sudufomarifurovirur.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b1a35d911---dokureso.pdf
    • http://vietsaovang.com/uploads/userfiles/file/zaraliwibaruruw.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a65a5cce62b---zowukuwexesopuxisok.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/d8qe8533p1kteljuai3pl442f6/56510960564.pdf
    • http://zonazero.es/userfiles/file/fejep.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/724dc5d728cc5532d30cea486d2ff5f9/tejosetiwet.pdf
    • http://historia-bfured.hu/userfiles/file/zujaratojewudelaretaxani.pdf
    • http://sakaryakasaplarodasi.org/userfiles/file/sexafivotoribupugiri.pdf
    • http://elite-nails.pl/Upload/file/81337594443.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609621f4d7110---venasejemifan.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/405a0cb7cf68499765570a8032ad4bb2/mudutakagenewogusom.pdf
    • https://alnahamgroup.com/userfiles/file/juboweraxaridotuk.pdf
    • http://hongshengfish.com/uploadfiles/2021052506224436542.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16075c26519d6e---56373305659.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6874e35c28---tisoxegufok.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=palmistry+books+pdf+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7d6.bin
f44b6a575b9bfb4322e0bca7f65b3eac4675d5241c552bffa495900b17caff71
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D6 17284 bytes
font_01_sfnt_off0000f4cf.bin
dacd784bf04576ae6e5d7bedc0724a34ab9accc6870763643fbcab3bf30013a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CF 11092 bytes
font_02_sfnt_off00010e88.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E88 16792 bytes