Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a46364562414d1…

MALICIOUS

PDF

86.5 KB Created: 2021-06-30 01:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b3ece1fdd7db3aad7fed12ce832d1ca SHA-1: 7ceeccaa62337ce9b6c21a90f99640ea7183f0a5 SHA-256: 34a46364562414d1ab712f3307eeaf5118771aebc90d1dfe683efb34b3550e1c
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of link farms on potentially compromised sites indicates a malicious intent to redirect users to harmful content.

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 http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ea9ee5733---katixusajixobifopixepe.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1b1bf413f---76997042652.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/4f9b7ddff9f6d5cec9f999a863e74c6e/vefaduzerixoru.pdf
    • http://abc-tel.ru/data/File/monexupikamenifuf.pdf
    • http://instandee.com/Images_upload/files/4167128517.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608423409e5bf---23614368460.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608372d108991---64108805395.pdf
    • http://moscow-vernisage.com/files/files/24053311401.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb00ab7be40---65925151062.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/64f8e2fc5b7f9d2950e3facdf3c68012/majef.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/uft5j5k36nc5fplj0l9dp46etk/wajujigeweg.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608106d044b88---sipatigikodor.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ec9c4c0eb---27443515155.pdf
    • http://fantalife.nl/userfiles/file/64480357006.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160989386cf7e5---46237759104.pdf
    • http://innovad-ltd.com/userfiles/file/kupadagimefopajuwofiluze.pdf
    • http://moscow-vernisage.com/files/files/17578650115.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/79e3fcde76d70b113a823fd34add820e/3822123310.pdf
    • https://colakcivi.com/userfiles/file/punoweva.pdf
    • http://yomamasushitogo.com/uploads/files/detodu.pdf
    • https://nnt52.ru/userfiles/file/rifomokubomo.pdf
    • http://rustproofingottawa.com/userfiles/file/vizikuvoronikemetatako.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfcc55cf99---94581476768.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608713f9ac23e---naruvanemivo.pdf
    • http://bjhtdszdh.com/v15/Upload/file/2021652142197664.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/f7cdd2f6817598ffc8de466cfb8c41ff/vefikizosa.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16097038f664d9---32609941194.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=public+administration+and+constitutional+affairs+committee
    • 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_off0000ef76.bin
ca2eefd33b3a691d2853ee030f8e3398c48b36d638755fed476270542b129cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF76 16724 bytes
font_01_sfnt_off00011ab2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB2 16792 bytes
font_02_sfnt_off000132c9.bin
a3f1d9d47c4f91f60e614e280436ce6ad9516dd99950aefbca0aae06322966f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132C9 10880 bytes

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