Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0308c346b48024…

MALICIOUS

PDF

94.1 KB Created: 2021-09-18 17:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: be626a5c31588709b1f45103517b6107 SHA-1: 70ebf50570c80cf187cfc9543625392d9981037a SHA-256: fe0308c346b480246314a90218094a862980b6b61390ab63fa7638ce2a5ae0ea
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a phishing lure or a downloader for further payloads. The presence of embedded JavaScript points to potential exploitation or obfuscation techniques within the document itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=watch+2+fast+2+furious+online+free+123movies PDF link annotation
    • http://otczenacts.com/media/files/gatefaxiwejigofuv.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/rakekeduwixegir.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612feaca7baa1---sasiloforibuforonobesam.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210910023043.pdfIn PDF document text
    • https://razredna-nastava.net/files/80465349266.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/lepasajebikokeb.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/gujesufinajogovuwo.pdfIn PDF document text
    • http://flairpens.ru/uploads/files/sumopavagi.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/nuvikezaxitofizunaxuguf.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/melipokazikudolekotunolu.pdfIn PDF document text
    • https://oriolefashion.com/ckfinder/userfiles/files/nejaluruvoronelob.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/30631181848.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/99380700201.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/14205705960.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/90587823994.pdfIn PDF document text
    • http://lowchens.org/userfiles/file/11572643065.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/59226775663.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/67116961613.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/51209575576.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/33795031234.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/dezexorabevikixirevakomes.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/83105364380.pdfIn PDF document text
    • 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_off000105c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C2 19316 bytes
SHA-256: f30095d562e8373663852757d8332e0173bd2d19255df8181925051a62b02001
font_01_sfnt_off0001387d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1387D 11104 bytes
SHA-256: 1d85fc690a795594e70c68e6f0129f781ff9aa108c1052463dd2a288f6090a53
font_02_sfnt_off00015267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15267 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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