Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30c2ab0b7495636…

MALICIOUS

PDF

92.5 KB Created: 2021-06-28 18:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0115a7666dcabbac6d90e4d43947ce44 SHA-1: 69b491cd70b9c9e35f023f2bb48b097ba01f9b40 SHA-256: e30c2ab0b74956361c4d66d65d397263160f82a2d2f1d9e98fdbc3e54244099c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://queure.ru/uplcv?utm_term=baby+get+hiccups+after+every+feeding
    • http://turnyras.lt/Files/file/supaxelolaparizana.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0c36c1a41044245f7b4187d26cd8831/56738163188.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8a5e7949b---misogev.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607837e4c964b---81981528901.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607917f5d0d51---98718147318.pdf
    • http://mt-filtration.com/uploaded/file/148397758460d39e273c9b6.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607451ddb14dc---56506960108.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c860ac1a4a4---11957526038.pdf
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/96234329023.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/78096f9bba347adbcb8240e5d0f3c8a9/49275760077.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/3bc2013af007929a19a4450e7798e568/renuwojamisorunowugirixak.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/2c31c58e67a180d3124123c0c4061311/lokalerabudikerotew.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f96be4c4c---jelumagabored.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a81986c1e0---10519515410.pdf
    • https://xanbiente.de/userfiles/file/gololibuso.pdf
    • http://driver-jazda.pl/upload/file/kipejujupifofow.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7d0f0e4a6---ladasotili.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/94d49863d44fc731a6be99af0b7ced0c/tefikijigerewawarutivasis.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfe1112732---bawinizibavififa.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/h9mrv0jmsnm2hr03p75j2l090a/26788523189.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/2993002470.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8aa488a1---46837347941.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/bhr7t1jvrks0tdtshl6us1mftt/59257739507.pdf
    • https://eyetracking.pl/userfiles/file/jujixikomiwofadowotar.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/foninegijidej.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc92b62d31---fomubodupofewopixabux.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_off000106b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106B0 16792 bytes
font_01_sfnt_off00011ec2.bin
fc8eac21573c0234a8cd8cae20f440449a641cb345ed6ff87d782ebd0319451e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC2 16808 bytes
font_02_sfnt_off00014a5b.bin
ecdb09e472bc422bd66e8f2c4391e79d0fdda27f7e1227a487b66df94301d168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5B 11208 bytes

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