Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abd68922fd09917…

MALICIOUS

PDF

87.0 KB Created: 2021-07-14 00:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 72eb41465cc1fb180d7965c2d696af42 SHA-1: d274ad075f65ba65d8fbf115a05b8acd838b426f SHA-256: 0abd68922fd0991776713eff9144f0016c29d25a50bae0758d4376cefc6ffdd9
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. Heuristics indicate it functions as a link farm, pointing to multiple compromised WordPress upload directories and disposable hosting sites. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

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 http://superpart.com/files/43757808511.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/77460026239.pdf
    • https://aneri12.cz/res/file/41146268389.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/5b5048f70ec7d01eb0ba03c58ce495fd/gimarebugikubepukiwin.pdf
    • http://www.anclupnapoli.it/userfiles/file/35744198169.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1a8019ea---nelimixoboruti.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/4ea769c6fa001681b858d98aeb4e9c45/falinoderorirogi.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810030e303c---16804667031.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b111d2346---popejogafomexitironu.pdf
    • http://grandinspirations.com/clients/75274/File/pivuvotuk.pdf
    • https://aslimitada.com/userfiles/file/61684430209.pdf
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210616011739.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c03ece9cda2---87898682586.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160746b6ceb2ed---tawonivivuminerasaje.pdf
    • https://psfund.org/public/uploads/files/cms_files/79827645436.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccd9606518---fatosupo.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/qj3ht4pb6urqrb383o8lqn51bf/vetitowuwonedan.pdf
    • http://nutronicltd.com/userfiles/file/19755914038.pdf
    • https://bodegoncriollo.com/userfiles/file/riwur.pdf
    • https://implant-drill.com/userfiles/file/99744404591.pdf
    • http://nagymester.com/userfiles/file/42045395981.pdf
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/4s09993ef4oceptqpv5dpaiuvd/dusufitamutepexanokena.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608353c68c695---85057949938.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/9f91ab5fdde44c1c50bb14ff900ed343/13118197106.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=this+old+grout
    • 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_off0000f23d.bin
f96fc03fdfbf866ce3fef88b08831683e32b86caae93be5c012146e6f24fa1a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 17464 bytes
font_01_sfnt_off00011ffb.bin
12c74e4676ffa3d56c2ad6d1a91bd0e0ab2c691c8addd0ac5106d7b6e304fc0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFB 10192 bytes
font_02_sfnt_off000136b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136B1 16792 bytes