Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eeeefb1888b85f8…

MALICIOUS

PDF

81.8 KB Created: 2021-09-20 09:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 727482236e7d9d53162dcbc07232f422 SHA-1: d80a108dac964336f9f10964cec6253bb63c36ed SHA-256: 1eeeefb1888b85f8f633b48debf02dce42bc873fac0db078bba992fc4cf69744
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=hacked+traffic+racer PDF link annotation
    • https://dcicz.org/userfiles/file/31516457909.pdfIn PDF document text
    • http://temdientu.vn/images/ckeditor/files/diwewi.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/diviripapu.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/rubejenogeterixotojexufik.pdfIn PDF document text
    • http://satyamtracparts.com/userfiles/file/tagesulovolezakelodonafu.pdfIn PDF document text
    • http://aloisiquadri.it/userfiles/files/29151099833.pdfIn PDF document text
    • https://foulardfotografando.it/file/rokiboxolemumuv.pdfIn PDF document text
    • http://teakdeck.pl/files/file/tiduxaverukajixip.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/90154256974.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e699691a5a---wirewega.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/93185083150.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/43feda02869a45da3eb5c24685f66262/35527092621.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/pawozorofufa.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/vokoxanulifebezuzobilu.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/pejexow.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/zixonifu.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/feritavovegixupamibesasur.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/lixubuduv.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/wanikubazopidufogelim.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/tajakojegamopi.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/9306528889.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/rerovebi.pdfIn 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_off0000e25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25B 10116 bytes
SHA-256: 6ca8011f93de2790d2068fb9cb67d65aac4842e43b067ee1efd3dee968fbb229
font_01_sfnt_off0000f907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11119 18048 bytes
SHA-256: e381e97f36df619a1dce01be26cd4ced9e99c2d767b9012b2570df2dea5d3e04

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