Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af1b6663b4927f1…

MALICIOUS

PDF

72.7 KB Created: 2021-10-01 20:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6f9a27cec55e10b5a5a8272cade40eea SHA-1: 4fabee53e02837d514d36a1cb92a69343e670857 SHA-256: 5af1b6663b4927f1ea51d48b7d5a57e2ed9af459ec604231276d273267718e09
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a potential SEO manipulation or content hosting scheme. ClamAV detected this as a phishing trojan, and ML classifiers also flagged it as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://sxnqx.org/upload/file/Fl202109120702115158.pdf In PDF document text
    • https://daaeportrett.no/upload/file/12699935189.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/dapafutelozugigimepaka.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/75995779629.pdfIn PDF document text
    • https://reha.bg/content/upload/file/63363436630.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/7893c2c07bbe917bc6adfa85aa40bf6c/41870364443.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/motumegevomarugexuruvo.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/gawelapamabamora.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/nevatupewupepi.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/zodubefaduma.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109200606314501.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/44633206458.pdfIn PDF document text
    • https://vitanov.rs/files/pepinofaderewitisefe.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/maguxe.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/lozoji.pdfIn PDF document text
    • http://terezszilvia.com/images/uploaded/file/851708403.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161377eb361ce5---99951110986.pdfIn PDF document text
    • https://zd-zeta.com/uploads/files/202109120316059309.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/ferotaforazuw.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/36834653848.pdfIn PDF document text
    • https://emailchopper.rockeit.com/userfiles/file/28059182650.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/84019767597.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/74706258926.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=gcse+balancing+equations+questionsPDF 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_off0000b642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB642 17972 bytes
SHA-256: 9ae69052e09bb2560cd7ee1db240848d70010d005076f49f772393876e8529eb
font_01_sfnt_off0000e4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DC 10732 bytes
SHA-256: 226f6b9dbc95d3b6b12ff6243b38406381687116982a20aab77e9128c1053ca2
font_02_sfnt_off0000fd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.