Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6ff9f12ca498b7…

MALICIOUS

PDF

99.2 KB Created: 2021-06-26 19:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6cbec708bf10a0b5ae8b81931fe73ee5 SHA-1: 226bb4f814c650c1b969e60602eba5e96417d692 SHA-256: 6e6ff9f12ca498b7d8766a8b437e3593d4a2e9ef6f4054ab64a0c5c065019acf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised CMS upload storage, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL heuristics and AV detections.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/7264cf5ffeb35ab35dc55fe930f05a84/4922815375.pdf In PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/3ceb0c1eb1746d9cfcf0f58fba524f2e/7579133172.pdfIn PDF document text
    • http://beateromer.com/bilder/file/rodikisake.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/671m75sde8r4e58jrs7v92i8l8/xotirusibutututivu.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdc95501d2---59877341069.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5d0f9732e---vatuguwi.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/4901422310.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/70h81vdeioe9vjo7ppff1e00v4/filinefagujin.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/sazarezudozajovawiju.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072197b94ef7---nufodukixoxovajijo.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/4t77u6q022gjrk4850rng1vlg2/gimodebijubuteb.pdfIn PDF document text
    • https://stopserv.ru/files/file/44000729991.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/pebakewa.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/bda70eda1f4a884899253fbd51a5ceb8/41529715851.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/koleti.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d00bc4e7c---zagawoxixu.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89dad44e5e---24575188625.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/80784178713.pdfIn PDF document text
    • http://araonline.hu/uploads/file/75742302737.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8211a4a0289dba4ed7437fbfc917793a/630064433.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/89925d0773734d48f381d908ebc032b7/joputi.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/zigud.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/wedejupisepevuvubag.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/duu697b1du3077fggvlf5g71mu/48786489427.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c482b806da7---51694718463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=another+word+for+catharsisPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A46 20204 bytes
SHA-256: 78f8c24a1c1edcd0d36f81fc89e73b8df3f4275816217e2bc741246780fbaa2e
font_01_sfnt_off00014dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000165de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165DE 10596 bytes
SHA-256: 3946c612bbdccc9d8c0748fb3786feb321a14ae1b1cd903432488bed2b203c09