Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fdd63bd15f730c…

MALICIOUS

PDF

84.5 KB Created: 2021-06-29 21:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 50f88265157ff1045c55c4d1c94ca397 SHA-1: 297ebc1b6cb20eaa4058d55c6a745c6843a3f107 SHA-256: 30fdd63bd15f730c3d446f6430257ad0e10d5180d9c482625d6641a5fd398f7a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier output of 0.995 further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=gout+attack+in+spanish
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a24d8c099---sazilipejujebexevutano.pdf
    • http://investin-khj.ir/ckfinder/userfiles/files/80022017447.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd86f146aa---fixesinufakekimogode.pdf
    • https://licorne-hotel-restaurant.com/userfiles/file/99022216870.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/heq61qn23n25u4o7asfipkg0om/3706023603.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/ddd9a03a6517d5e7737bda053bf638b3/lisagu.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16097dcdc9775b---xabavipoxerozoz.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/dab430e9ff0969e4efdceb3fa133f24b/72390218591.pdf
    • https://mollis.rs//files/tevafe.pdf
    • http://www.alfapilates.pl/upload/file/muvupoje.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877e02da245---vegejodazadur.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/73a2eb68d857dc947b546028e43c5cf4/48964612583.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6416ed8c---79754804457.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d77f04ddcc7---pagesosixima.pdf
    • http://vvk-wiedermann.at/userfiles/file/68186813170.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b87c439d4df---15131695762.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/fe8hqjitgfn2n2o70dicf64bo2/77193836505.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7f788d286---sexafuzibeb.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9fbc05584---94763606071.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b059f46e14b---mobimu.pdf
    • http://mu-rrrc.com/userfiles/file/povogivuseriwatatel.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/120bc2c594f51ea372a095948873a737/57633933952.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e5e7f34b7---jabebu.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b488cdb3fd---wisetadalowojexibupabixub.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/f6f0c0a109d33a37202753a9901c6805/xisozatala.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_off0000e96d.bin
b4db81fd14713eabbe5389c0f754361b390065a3d946af0b7dc990721cb768e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE96D 16892 bytes
font_01_sfnt_off0001151b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1151B 16792 bytes
font_02_sfnt_off00012d32.bin
3bd1438287d6e35256d88711295c0046730348656743a50f77b4f701577bf2a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D32 10424 bytes

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