Malicious PDF — malware analysis report

Static analysis result for SHA-256 f183bd33354f1947…

MALICIOUS

PDF

83.7 KB Created: 2021-07-03 20:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9986c970e63fac05b6e97ede52149139 SHA-1: ad1a867bd6f3287a83a1b55c7508190da1eff8ab SHA-256: f183bd33354f1947898d03ebab69ea85b8bdb72d684be3201f16c542419d6ef0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs that point to websites hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious content, consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://planet-for-events.de/userfiles/file/22874038322.pdf In PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10150305810.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e725a0224---31574275593.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c43eb192763---kowakirokefovoda.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855a051204a---zokakatikuxip.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/gamobewalagom.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/2062521368.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/zuxegisav.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3b92fa27994f13160cca1edc3bbf6ac0/zagovanawiduketiboki.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609482108cffa---dewupokolinedipise.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/nerubijox.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/siwuwumegizexim.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/xeloligofajabirifiz.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1810e660e6---4721411402.pdfIn PDF document text
    • https://windsbs.biz/files/file/losudegupezivopejulidep.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/gerakedasimomorukut.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/26901577755.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/dufuxaririsiremoxadufuxom.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608021294ea6d---sebenu.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c55c1d410---somegozamarukazivadux.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/o97oscsb5ar2usvgobaon66r52/penurawug.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20f6680f41---84715627102.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949e71ea189---nitatidabaruwatozov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=butt+workout+for+men+at+homePDF 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_off0000e6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CA 10504 bytes
SHA-256: 249e0bb8180ca682fd680bffa8cf83aff056ef693349d1b377e395566793bd3c
font_01_sfnt_off0000fe9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 16588 bytes
SHA-256: e4488028324780f4619455145e114f6dade600bb2b10df32c650000339d1a30b
font_02_sfnt_off000129af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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