Malicious PDF — malware analysis report

Static analysis result for SHA-256 918576655130743b…

MALICIOUS

PDF

87.0 KB Created: 2021-06-30 22:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 287de6b186e68b750abec09c61645a82 SHA-1: 77942defa84fae27a4fa543a0eff0c7609d03563 SHA-256: 918576655130743bceb1c501faa50b8eb50fb4bd17db26f558f6fb829100af24
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and UTM parameters further supports a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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://licorne-hotel-restaurant.com/userfiles/file/mimesofobunetenuxifisave.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e019968806---97689842347.pdf
    • https://tecnibat.net/uploads/archivos/86715648405.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/edqpmhncae42otj00iep35qk5f/jedovawe.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160dae6c25fbbd---jigiresiduvosap.pdf
    • http://dansensvenner.dk/imagesfile///55102610419.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/cb69fae93cd22510cfc0b9afb9993001/mowovodanezakuzonumaju.pdf
    • https://camelcarpet.org/d/files/ziruguwurekexowekirote.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfe0fe0eae---84015464295.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/sajizeriromadomubejoma.pdf
    • https://luminex.pl/upload/file/30288026935.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/97ac635dfd10f4d948572b2eae448de6/41421046399.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/sv3v9f8pq2ibldm44fi8p0cdn3/88716571714.pdf
    • http://whatdwellswithin.com/file/31322237810.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/2c9bc8ddeff00000b84ae05f6576b72e/zifizaxobofonatupewufivib.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/91v718tfp7cf0vak66qm5maq76/55299505074.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b92ecd9777---levokifo.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/1c946ddcdbe22028c955aaf8bcfca1b3/ganusonujiwewoxojusil.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0b0950a5c---matufuweto.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c923c6cdd13---ximulupup.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/f6f20337eefb2c391b437a96d12d29db/34351948845.pdf
    • http://angelcabrera.com/FCKfiles/file/59239511985.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/8ib4ruvdcaov6ropjodbsi7pl2/dusonunat.pdf
    • http://work4shop.cz/userfiles/file/85605858598.pdf
    • http://hyundai-dongdo.vn/images/files/kinonipolatobejig.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=meaning+of+monoecious+and+dioecious
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE8 16792 bytes
font_01_sfnt_off0000e2ff.bin
674c73ccd8317ca7859953348ff833e9dd4c2c280b2ef99a689e7306b1db1f23
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 10668 bytes
font_02_sfnt_off0000fb2d.bin
c93a114462f30c1e29f177d4e933fb446c6faf3d5a786ca4d09fef8233b2701b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2D 2600 bytes
font_03_sfnt_off00010606.bin
83cb6e4faddc910705ad47ad037685d854d449e9c037b8a2fedbca4323eedcad
pdf-font-stream PDF embedded font (sfnt) at offset 0x10606 16100 bytes
font_04_sfnt_off00011b50.bin
afa124c5b755a80770833149edfe717901ded8acfcd13494a452dbbede77ffbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B50 20064 bytes