Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb5ca7cb863f0dd…

MALICIOUS

PDF

76.7 KB Created: 2021-09-09 18:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fd64f21e831460e1dd5f09d8b8fc318a SHA-1: 9cea9e647c453f3c2c49a16414f291278c031c92 SHA-256: eeb5ca7cb863f0ddae86af15b601bca2081ebb38b2344917116c99f0f475a643
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous external URLs pointing to various websites. Some of these URLs are hosted on compromised CMS uploads or disposable domains, indicating a likely attempt to lure users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://basketaci.cz/UserFiles/File/furosuxevusokak.pdf In PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/sotevopufutevewojuwes.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/3717731068.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/wepuf.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/tiwumebonutufeluxovawe.pdfIn PDF document text
    • http://goldenmallbiotech.com/upload/files/pofikujipe.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/fogokigirexorekexamafoge.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/83533853213.pdfIn PDF document text
    • https://laser123.com/geektic/files/13397558341.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/89906448842.pdfIn PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/jowutofulipuxivejerutota.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/lituvemuxebututizovuzimij.pdfIn PDF document text
    • https://clinicaalcantara.es/sites/default/files/userfiles/file/dorudap.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/28991a073eecc1a295d399285c17196f/tofuliripawetesalot.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/xuxaxikekupuduwoga.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/muvadijajerodop.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/bofonadibuseguseribo.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/39890209699.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/tibavabevex.pdfIn PDF document text
    • https://pmms-online.com/assets/file/fedaletezenobezajilab.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021090806325453.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/f18689a98f25dbbc56b665224a9ff4b6/bovumude.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/6839361334.pdfIn PDF document text
    • http://qdjshg.com/files/file/nejopekuwetodopafexo.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/e29a7acd99576e8f95fdebe7f54ccb35/tepigujifu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=ios+simulator+in+android+studioPDF 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_off0000c424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC424 19756 bytes
SHA-256: f3da7cd92c4494275ebb0b4cf37297a1e0ae998c8e30cc7464c0d83452bea5a5
font_01_sfnt_off0000f58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA3 10328 bytes
SHA-256: 4e457b5def8fb4f0e17bb413c0bcaf012545ef83a7717b7e8475a9a55902c9c9