Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d223d067aa55b8…

MALICIOUS

PDF

86.3 KB Created: 2021-09-18 15:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5c3266313d1081f732163920e3dc64c SHA-1: 0d3007995e6e0ec5b25d4555d2d8871951a9b113 SHA-256: 26d223d067aa55b850e78eee12a5000435e89ce7ff0c88ca6890514879ee13bb
164 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it's likely a phishing or trojan delivery mechanism. It contains numerous links to compromised WordPress upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://securitydm.rs/slicice/file/31862247155.pdf
    • http://chromowane.com/userfiles/file/59165530209.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdf0835f18---gegizugiwotowitota.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161391615b6e55---2296047361.pdf
    • https://thefertilizerproductionline.com/d/files/suzutuxisopedogelalive.pdf
    • https://aquaprosmart.com/userfiles/files/polepijafiwale.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16137891be0a1b---17066058446.pdf
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/xogina.pdf
    • http://botosani.ro/img/uploads/file/21791946282.pdf
    • http://clean-ecology.com/Upload/files/piwaxod.pdf
    • https://artistprasanna.com/userfiles/file/89543037630.pdf
    • http://www.bash.cl/media/file/57717542200.pdf
    • http://andrenickels.de/ckfinder/userfiles/files/zesemusadepigemowazuxed.pdf
    • http://musicandyouapp.com/webupload/editorimg/files/gotaf.pdf
    • http://ji-tien.com/userfiles/file/40598025240.pdf
    • http://darec.sk/files/files/gefiveb.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614524b0bc07d---vemenawapujenak.pdf
    • http://xn--aknmedical-yub.com/uploads/file/tometo.pdf
    • http://olgapolyakova.de/files/files/vonituxuforuzixiroka.pdf
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/maredibosonaxipomexuxoxab.pdf
    • https://actionsporting.com/userfiles/files/fesolodolenobatavux.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137be90cdfaf---nuxituzepolibuxapef.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2b1ce6d16---83698360380.pdf
    • http://www.hgbehringer.de/img/files/files/78781479170.pdf
    • http://ettermanenterprises.com/ckfinder/userfiles/files/xubefivewaxojonisijevofo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=cool+room+ppsspp+gta+5
    • 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_off0000eb2d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 16792 bytes
font_01_sfnt_off00010344.bin
01d11a3bd3df27a4320b592309ef3beebbf7dfd364ea3db35f0a8e5c6a58eddd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10344 10432 bytes
font_02_sfnt_off00011b07.bin
50577ecdba5d88631c0a3630afe2691b4426b3b61b94910de9b0ef5521b6c6f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B07 18776 bytes