Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82029ef64427066…

MALICIOUS

PDF

86.8 KB Created: 2021-06-27 02:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f7bafdaa312001583f4fae802b690ad SHA-1: 84d4911120274ed50ca67d5d1f896094412fb293 SHA-256: b82029ef64427066c2d729a51b22cd0fb009492e7fb07308b4cba1d13b1e6dbf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farms pointing to compromised WordPress sites, indicating a likely phishing or SEO manipulation attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/4144fb8f662099a4d71c8858bb7c2a27/lufakolanogejimukamosugi.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/d77cb55b8a18a6e41b8869b061dc9b4f/25159116978.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8a3d270a8---95312013691.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/pukela.pdf
    • http://skyline1968.com/clients/74864/File/zikupov.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/950a43b78c718dff15e028a842fc27c0/98111093004.pdf
    • https://24emk.ru/ckfinder/userfiles/files/nesalizajejivafuvi.pdf
    • http://sungwoneng.com/upfile_editor/2021/files/komimomekitavuruwisu.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/1164ef77c4972c17742dc0215208aab9/gofawusexunozolatikuru.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/ff751e5f6b25f088b0e69a53657b3467/roliwivupuxivulasojub.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/8b74d1bd06006d16a7f943cc1eacb277/66077850801.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/a51de0723718f79dc352242743bdda07/diduvisupumataz.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804f659d106---72912243893.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608decbb6bc85---buxad.pdf
    • https://louvre.lv/res/wysiwyg/file/18965218401.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a9d919868---favuzawinanelawesaxewu.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/52f1d7d23ed7d03a4c98a83ab3c735ca/91341865439.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9079eb788---sukagebasenitik.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160c899e35c77f---27184497671.pdf
    • http://deborahkay.com/ckfinder/userfiles/files/40484395321.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/38vptnea3aqmnmneqf6fogsh0p/1633793837.pdf
    • http://wallacewilliamsfamilyreunion.net/clients/6/66/662ca4338cd1fa41fa93b88222973dc6/File/pobipomuxa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=low+level+systems+programming
    • 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_off0000efea.bin
e3fd06fd3de92ff6118d0c0a0dbb4d48c8a0d1276f3e3b10c0d7f4b63bd3f462
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 17196 bytes
font_01_sfnt_off00011cec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEC 16792 bytes
font_02_sfnt_off00013503.bin
e1f6cd33318ff0293def69002bf78c131c9e120c1184cc2682bc4688a8639f60
pdf-font-stream PDF embedded font (sfnt) at offset 0x13503 10820 bytes