Malicious PDF — malware analysis report

Static analysis result for SHA-256 192bda6d153bb81e…

MALICIOUS

PDF

91.6 KB Created: 2021-07-10 08:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36406f46a819ac1915aab9a3bda3ae42 SHA-1: d982b26a7d4501b3a9d70f0da52289d300980c49 SHA-256: 192bda6d153bb81edd5a95d6f7a168af8381a7704560b5a5179c9014a43e31f9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites hosting PDF files, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, so the primary attack vector appears to be the exploitation of user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e0cc3c45e---60283780716.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/578b41ad35283359114643940997d620/vukogumufijikumezokosub.pdf
    • http://piqiso.ru/userfiles/file/97470147626.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/el56hu8qj8eg73gsghkssf2cnd/18120445837.pdf
    • http://ttccid.com/userfiles/file/derupesofevexoji.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/f976844de168b70f4ea135e371a56ebc/1862846516.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c2518df3f---zufibasuxudasipuz.pdf
    • http://clairerolo.com/userfiles/file/vemukiziruka.pdf
    • http://davidhammerstein.org/userfiles/file/kaxurilisonex.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/63156b595b643fe235e6dffd390d1716/bamedoj.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74462ab828---67555626957.pdf
    • http://abnicum.com/files/file/49249408156.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f70459078---visoruwerifoxizajekitore.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609d88b85bc02---podimubedoboje.pdf
    • https://numberonerevolution.it/file/84591363553.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/9648038901a569efcb77010fde27a0f4/merijasukajarul.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0059e6f325---wotikumi.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6c6aa2dbe---78453224414.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9c6f0187d---lanowojugonejigev.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/8d838145046e64c1e014a1c4d9227490/71491554478.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b57299dbf0---60591367939.pdf
    • https://ntct.dz/ckfinder/userfiles/files/xopipefusa.pdf
    • http://capital96.com/userfiles/file/37799679331.pdf
    • http://ippon.lv/uploads/File/fiwokojomotuzarelupusodox.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=draw+linear+equation+graph+online
    • 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_off000101b2.bin
d84c2b9545505150f596bc091e51b9db7f0973654d22918760647b3cdb9d33f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101B2 17392 bytes
font_01_sfnt_off00012f52.bin
c2bf291cd1e983cda204f910ea70ae4e9fb399d379ff13bcf504ac9a0b52f406		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F52 10696 bytes
font_02_sfnt_off0001477b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1477B 16792 bytes

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