Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e7e685d00e251d…

MALICIOUS

PDF

103.8 KB Created: 2021-06-26 00:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fcc55e0239531d9de1c759c8a09105a8 SHA-1: 2f29b4d4921f8e5cd5878ea28d982bd1efad73e9 SHA-256: e2e7e685d00e251d0548540d334ca55cd984761ba8fa07293ba0187e272b242b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. Heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest malicious intent, likely for phishing or malware distribution. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/5l017msjv2kvs2q2ihedsd9qmf/2203079801.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073208ca4b7b---tejofeka.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/4e2f4433d57020708ef835887d9e0d8a/berikifu.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b808702543e---mewofelojumakodikigaxa.pdf
    • http://bclgrouptt.com/userfiles/file/23202017934.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609153e1148c3---jemilotozadaxisabo.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8351829897---muginotaxojovow.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8f0edb1f0---1800632415.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/ea0940687cb2d3897347b43f4d3fb0f6/32631304490.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/crq7fe08mcmr3um10k2mhi5b44/fogelokut.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087ad3c841c2---92842273218.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/lldkh9c9b1vgnt6sodvqhfhat7/50943912552.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079102b5f699---xafusonivezin.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/ca34aaaf003ca7544b1facdbeadba5fb/40564078290.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/htupaol5a7ov1ubatu5be0p257/bemumatatosik.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d32a758588---87565535123.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b350089b5f---66838243634.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083dff4cb6e0---10960235331.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/efjatkn3rt2g9igjr5b0n96035/91965277948.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4c35023de---lawokulojedejewurux.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfcb68bc55---13746622224.pdf
    • http://peneleos.pl/userfiles/file/xixuvowapefarisenajikim.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/118092878260b77165982d6.pdf
    • https://alate.org/admin/fckeditor/editorfile/81828832890.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=happiness+inventory+questionnaire
    • http://pro.ovh.net/~tribuene/images/banque/file/pibojavamufinimokuworefe.pdf
    • 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_off0001326f.bin
308adf22c09d25a6df3b0f70b9cdd22a9a01d6a7993eddaa9b481953039046ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1326F 17828 bytes
font_01_sfnt_off00016113.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16113 16792 bytes
font_02_sfnt_off0001792a.bin
0e2f1927865255f86b28e8ede1ac8addccf9a0ce734d8a4083ab50057501718e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1792A 10616 bytes

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