Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abdfae72773aa15…

MALICIOUS

PDF

73.6 KB Created: 2021-07-03 06:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6434efe1762d5d4671e28305734a288 SHA-1: f1c3fd3e14585c29466bca2f010899ed1a6f2b16 SHA-256: 2abdfae72773aa15d8deb47374cdbccc7ce051d95cc48076f9700aa5fb78105a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm hosted on multiple compromised websites, directing users to download files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external links and the 'link farm' heuristic suggest an attempt to redirect users to malicious content, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/sunavoguzi.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/7bedvtp1nhjp9ilvf0ihlo5omu/sovena.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abbec1ea6a0---14214183783.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/d04e715381c4df5bd13aef29e0f24978/75536482593.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d848dcde4---kinugejudovo.pdf
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/6adcc6e69e0cb417275883b8d42e649b/29528229409.pdf
    • https://perfecthospital.org/ckfinder/userfiles/files/35370739778.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c911c9bd87---68211359367.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860858f2dea---zodarezirekexikifu.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/2157b3a91b16488ef1a430f53106aa6a/melewegajunuwomuku.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7fcd0a3e8---zojire.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc3765f7cf---97065721361.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607930dfce10c---59679647821.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3e5b2c7ae---jumuxoto.pdf
    • https://advance-pack.com/editor_upload/file/luvizozovafilekewo.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb28c07850---63458947781.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b394c7cd65---10606870031.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/7576dfc1349e4d599cc6dd3d171edf4a/wulijofumagiw.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/308c653d5f7cf13f41e308c68abce1c2/77425651271.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/25611b83f6e47f056223f31e30e8d68c/bumamemupav.pdf
    • http://topenglish.sk/app/webroot/gallery/files/lijewavalosatasonazuruw.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/6606d86b4a7a62ed301332ffa9721ad5/35691479324.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a764d332e44---voxirazeji.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=download+jcheater+gta+3+edition
    • 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_off0000bd9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9F 16792 bytes
font_01_sfnt_off0000d5b6.bin
00cb57939114a43a10ca2523a0f958830465bf64c095941c6665092ddda52657
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B6 10872 bytes
font_02_sfnt_off0000ee9b.bin
e562cb2cff8cb04efb2648b313095a68471750f7c1b78c4ceb042684b63912ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 16400 bytes