Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab345df73ece8f4…

MALICIOUS

PDF

80.3 KB Created: 2021-06-27 15:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a3ba01a4174dbe350d270d4999388ca8 SHA-1: bcabd2fc06d050bd5083a232431e694ea6a09a97 SHA-256: fab345df73ece8f4d0836f05b9d61e58e1ae96cd45a071df0e8c52cd2deba728
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The primary attack pattern involves luring users to these compromised sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/172b766a2cd6f223b8000b2aeeb254a0/malosunazezanoko.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c183c841188---minikoji.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/602c94e410585ed06085a7c7af70fd5f/4748405503.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/541825447f5b162b91646f825e2843cb/dulukidudogapi.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef27c619a2---88880472415.pdf
    • http://www.oiseaubleu-promo.fr/userfiles/file/domorawilojozodulesa.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/mr4q471oivrfmshavn9btvodck/wisokeduguxewesazerotoje.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36b703e5a5---9232504526.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/24768bcac6ffe953d37bb68f320c832e/tupal.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853186e37c7---wonopopeparenuduge.pdf
    • http://fitviewer.de/files/file/devikibamisa.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/726addb5e66446177d5c5feb46a0dab5/27654142059.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160758d5d9b73c---64984812250.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/2df54b5ef0c92c5763578c91536ef7a6/27796484958.pdf
    • https://steklo-shik.ru/userfiles/file/37667171154.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ns8ngvn43ebem5gov1l4424rf3/zapipik.pdf
    • https://aldurra.ly/images-editeur/img/file/31315186641.pdf
    • https://alrashed-alsaleh.com/userfiles/files/govaxaxawetexuweliguta.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/54b597ff9b7e14502e0540ac6609fcb1/simuxiruzexufijikutapu.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/847d79dcb14a07f7079e0e9c70b747bd/45319421109.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a58da610b4e---zixinexurowunose.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/13106631576678db90d20426fa1eb841/pafumo.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/cc2133c3ab8453c0369eb1751d4de1cc/65724690934.pdf
    • http://anhuifan.com/upload_fck/file/2021-4-29/20210429140600163597.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/4c1f949af31ec1a145f8a8fffa8306b5/95364047276.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/qdter6hk4p651ks3m01maj1mjd/lonabijagoxojimo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=cubic+feet+to+acre+ft
    • 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_off0000d491.bin
fb6b77b15aa007b67d33368a4676ee5fd76c66f6d796e5ada15a75de50858110
pdf-font-stream PDF embedded font (sfnt) at offset 0xD491 18328 bytes
font_01_sfnt_off00010332.bin
6c3b1d6cf9846f892f75bf118f3d736d5e7cb075c4190345d69a0af5008bd0f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10332 10280 bytes
font_02_sfnt_off00011a8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8A 16792 bytes