Malicious PDF — malware analysis report

Static analysis result for SHA-256 654f889c56ad00e2…

MALICIOUS

PDF

99.4 KB Created: 2021-07-04 00:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a7b03a9df4e3713bc8175f02bf287c5c SHA-1: 7c62b94d053caba44c84a3f9f3d04ff0c8e2163d SHA-256: 654f889c56ad00e2d274d3ed26da1a7f74a203898c11a073a32bf4246b490191
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to a compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the link farm suggest the document is designed to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

Heuristics 5

  • 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.
  • 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://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/rokubupijedatabijutani.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de7f6e6aed---nabeboz.pdf
    • https://vildmarksjagt.dk/userfiles/file/sakitelapagarus.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/tjfou7fiag3ilmviocatuhm23a/83955287494.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/a575630ba586ada3f7f43042bb1ae4d4/rizakulekevip.pdf
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/tit0kjb6h21h5i4p877tdvjtf2/48384049975.pdf
    • http://robalton.es/Albums/images/file///zijimekamitolowuvitujuro.pdf
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/9b684e5f0381c061e0bf7f185354fe99/ruxovonavuguzuk.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/q926e2grl9038u12ccqpqpqmft/zemabutilasanowikubalofu.pdf
    • http://www.buildingmalawi.com/images/uploaded/documents/90853139705.pdf
    • https://ctsgroups.asia/images/file/21657203788.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f64c477f88---48695020224.pdf
    • https://amblamy.ee/upload/file/zasikirajane.pdf
    • https://studiorampinelli.com/file/wufodivajemikofe.pdf
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/22128344283.pdf
    • http://ottotech.center/userfiles/file/lovarojogijezeg.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/6b2450cdeb7673ea3becafea88e278f3/powumozasipesotesonog.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/30113fc4d7e06fe966953e2f8c12c076/xutoramojasu.pdf
    • http://aps-mes.com/files/file/pigajedamasokitabe.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88f6abe25a---sariruwopotudakipudenamun.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/6ed97323e58a948296eb671eb5baed38/xutuzuloxejukurat.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a0e37496f---zojidawug.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/3977075fd8421fb5692d29559f63ca0c/21553764646.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ucec5kcplstgtiv0cd0nsk9k17/dikegezajogabumiboli.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=best+lake+hikes+in+oregon
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ba7.bin
a453140fa2f91958c824d043ebf500df38c255aab19b47eecb7eab91dce020c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA7 10532 bytes
font_01_sfnt_off0001239c.bin
d19465a7c25fca9ac3341e56d6ecd6903b3cc3052b2261b5fbef81bafcaa8181
pdf-font-stream PDF embedded font (sfnt) at offset 0x1239C 17492 bytes
font_02_sfnt_off00015175.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15175 16792 bytes
font_03_sfnt_off00016986.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x16986 16312 bytes