Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3fe4ea50a0c5ea…

MALICIOUS

PDF

83.6 KB Created: 2021-06-27 01:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ad243cf69997e630c9fa094d332bb5c SHA-1: 0b00a06c3b0366592db72a4b14aca68e78c98ce9 SHA-256: 9d3fe4ea50a0c5ea683b9ed82ac9de2aca2b86f7f09ed2223ca63910d68a028d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits vulnerabilities or serves as a phishing lure. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest a link farm designed to redirect users to malicious sites. The primary function appears to be directing users to external content, potentially for phishing or malware delivery.

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 https://smidgel.ru/uplcv?utm_term=nail+shop+uptown
    • http://chapelguild.com/images/usr/vukire.pdf
    • http://andrelandberg.com/userfiles/file/kukonanilo.pdf
    • https://strechybenesov.cz/content/85100847830.pdf
    • https://alshamiltrading.com/alshamilfiles/file/lotolib.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd50f5379a8---25391893723.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/fd626fefc36e83ac22739e11aa1743c4/wodugatamijubo.pdf
    • http://smolensk-bakaleya.ru/userfiles/file/guzezuxax.pdf
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/28931904202.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/658de709e815db6ee41267f18b2731d1/kenizimefalix.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cd7bddcfcba---kolep.pdf
    • http://studiomontironi.eu/userfiles/files/wonemojiremu.pdf
    • http://minuspk.ru/minuspk.ru/userfiles/file/mutanofaxelajazom.pdf
    • http://macautemple.com/userfiles/file/68970666470.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/d6daf43d4bb93e3257a7e0e65512bd54/niteruvajatuworerew.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/legaxemutanixunor.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc315c7bb0---sesiniv.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ba6ca8ee6---18432582776.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/a43928106053cc9690589e234dac2cde/86911129360.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607b26fd51ba5---pudelukom.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecddee6796---mamubep.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072a6dff3972---37133314670.pdf
    • https://condominiovillage.com/userfiles/file/84019668556.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845c070269f---vujaditizofenut.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_off0000e4d2.bin
f714341d8ee1be62a59092d87ec2cc98d5999b592fffe91814aecfdd84606053
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 17476 bytes
font_01_sfnt_off0001123a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1123A 16792 bytes
font_02_sfnt_off00012a51.bin
71694e7dfd3be9d89f3ff44bb108dca24e2548fb42005e07b3deb2449c7c06b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A51 10280 bytes