Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b25647969f3bfe…

MALICIOUS

PDF

84.0 KB Created: 2021-06-29 13:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cadf6a9b223670729ca22ad7b940d4ac SHA-1: 03c924c5c5401c22d82b7d2a2ada79b081c3f6ac SHA-256: 74b25647969f3bfef8498345286cfd6115e12e831e9cf8e030b4d96d2ebb635e
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting, suggesting a phishing or SEO manipulation scheme. The document body is heavily obfuscated and unreadable, providing no direct content clues.

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://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/19571310834.pdf In PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f397cb032c---powojavupafef.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/906f4c6ea29b12671c059b4135df376e/fezutekepasifatogiwuni.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2e00ebe9f---tovuzojizativiluminadoz.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/83471645140.pdfIn PDF document text
    • https://honda-otolongan.com/upload/files/95126378422.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b4d15d17e30d037cadc92fe0b1290b5f/sifobujadozoxuwow.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/88781116975.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/49484540979.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608564249bf7f---49551777915.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e595f9d88c---44760941847.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/1d2nt753vkig9as711gch1ddorfb564j/suwofunizovemovirijagixi.pdfIn PDF document text
    • http://praguetransfer.com/files/file/fikepanuverogato.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/721f95d88620929c12bc81048697bc17/11720336141.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/95738972204.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/81881152569.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/9cb4770ef8e0f6dc7ec6750e11e42647/malipepojokowom.pdfIn PDF document text
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/55705164071.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/bd341b5749586dafe6648f586ae78858/kagolitav.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/d03224f69348b9092b5c65717509c9e3/94556680587.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/revozufejerefigeduked.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/pabodupikuzakaw.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d4d02b70a---82185358495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=chondrocostal+junction+syndrome+tietze+icd+10PDF 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_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 17284 bytes
SHA-256: 489ad8cc28b447ae69053cd0b5b306bfcb821eb2f4f680ee000803400dcd5821
font_01_sfnt_off0001100c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100C 11244 bytes
SHA-256: 326d9c0e4076a37c16e32b3f23f12ce411fe89b8ff844f9313d21e6d9026ec11
font_02_sfnt_off00012a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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