Malicious PDF — malware analysis report

Static analysis result for SHA-256 09de1d75b0b43985…

MALICIOUS

PDF

78.4 KB Created: 2021-09-17 19:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d888a0071f5d1a48ac533027fbea6a45 SHA-1: 3336f61d41c7fc8dc916426e078ab7f6e59c59f4 SHA-256: 09de1d75b0b439853cb8f61c7b2da387482b405c385256b9db685ed6812a3c2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing pages. The file's structure as a link farm on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=equations+with+x+on+both+sides+calculator
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368d6ef08e3---javupewosazulunagejili.pdf
    • https://glaskunstcentrum.nl/images/file/guwelomanomumeburo.pdf
    • http://lexprikson.com/admin/style/images/userfiles/file/pedipifadexuko.pdf
    • http://efuegypt.org/userfiles/file/94316898974.pdf
    • http://bortran.com/upload/image/file/20210913122354.pdf
    • http://bmcnx.com/userfiles/file/vizadop.pdf
    • https://scalping.ir/data/files/file/wanogememug.pdf
    • http://ongxoanhdpe.vn/upload/files/ramulob.pdf
    • http://terminsk.by/pics/files/medubeg.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/161400ae8f1b3e---37176683234.pdf
    • https://lolakarimova.uz/ckfinder/userfiles/files/53154494352.pdf
    • http://sushigonewildtogo.com/uploads/files/20630068341.pdf
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/bazenozobodiragipow.pdf
    • https://urologasdainys.lt/userfiles/file/19000021733.pdf
    • http://hexindechem.com/upload/files/60368920435.pdf
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/538161916.pdf
    • http://aylabawadi.ae/userfiles/file/63640390386.pdf
    • http://www.valathors.com/ckfinder/userfiles/files/19823224265.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/e4f19ac439b1e1abf32bfa67265002cf/287986364.pdf
    • https://rabudiagnostic.com/userfiles/files/28159278776.pdf
    • http://indigobaby.eu/upload/files/pologobaz.pdf
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/74370073421.pdf
    • http://giovanniseneca.eu/userfiles/files/jalifenagetatokitab.pdf
    • http://alituncer.net/userfiles/file/ladiwemevepal.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_off0000c99e.bin
efaff27a4ab655a27929cbc25fa3870b056db46f04436031218f9fba7dc39507		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC99E 18508 bytes
font_01_sfnt_off0000f9f1.bin
ea6669d839a2ac2758152d2f38d6604fd588e5ea09629304983d7eb1342b573f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F1 11024 bytes
font_02_sfnt_off00011360.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11360 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.