Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b175ce4e2d650d…

MALICIOUS

PDF

129.4 KB Created: 2021-07-03 15:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5ee3078d4528f3741a0fbf3102a2b0a3 SHA-1: c9be5e38180be0a903cd921280c9565dee86b7b9 SHA-256: 41b175ce4e2d650dec33e8da7d22838cfcba88876c07e98a4e29fe833920119b
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document exhibits multiple indicators of malicious intent, including a high ML classifier score and ClamAV detection as a phishing trojan. It employs lures related to payment redirection and recovery secret requests, common tactics in business email compromise schemes. The document also functions as a link farm, directing users to various compromised WordPress upload directories and disposable hosting sites, likely to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://royalwedding.jp/images/blog//file/28771241094.pdf In PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021062603120480554.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/vqt0p4je0kc7nk8139rc587a93/39020192328.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/nadadewenelosagova.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/vh82rlrtrqb36jbu3vbhp77k3d/bikejivowavulupobegejufu.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3df12bfea7a99cd36c0c422d5c5606d5/vosebemuvuf.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/a55a34773a4f31969d606030a93a52e6/zapenatudujugemajafozodos.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d486b180de905247cbf72c072bb51ae3/zegonagiwowubomed.pdfIn PDF document text
    • http://altinay-law.com/images/file/zowazajukegepe.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/71888106040.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/2431817173.pdfIn PDF document text
    • http://knuhpharm.kr/userfiles/file/20210618135849.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160da27e1a5a04---vezufuwofixumepawodul.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/74163066117.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/2367e1084ce265a5193820daa79b87f7/leseminine.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ce8aa729c---jesivalodawedesixuma.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/65752940867.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/20c79a9caffe82351960d24b8393379f/tozakujozajidimuvoba.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082f1dd5d2fd---77896184135.pdfIn PDF document text
    • http://ubest.ru/images/file/dofexova.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/0763d65312423506b8d56b41c4d3395e/fowuwebejemo.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/b7408efa6be99555b555127a90294f5a/93591260240.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/fusegutisalefu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608897099ab54---50891236371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=ccna+2+v7+practice+final+exam+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000197f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B00D 10976 bytes
SHA-256: d31aa783c95398f0af2a6551e50a1dc1438733c02909682416404d5b89e49e56
font_02_sfnt_off0001c9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9B5 17628 bytes
SHA-256: 1348b87f1584b747ea25e7e600b8a84082294d8ee48eaf3d51712164a4aa7033

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