Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f307d4ae61ade9…

MALICIOUS

PDF

73.9 KB Created: 2021-04-30 23:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 30924c46f0b55f855fa9c4548c0fd74b SHA-1: 2514bb1a5432928955828a51f3b47051dbeee3c0 SHA-256: a0f307d4ae61ade918d007aea0f1ab2b8bcb7ff1e2e990235b1b59d86b7d55c4
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs, many of which point to disposable hosting or redirectors, suggesting an attempt to distribute malicious content or conduct phishing. The document body, though heavily obfuscated, contains references to 'Naza lite manual' and 'wkhtmltopdf', indicating a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=naza+lite+manual PDF link annotation
    • https://cdn.sqhk.co/vitimosugu/0gdjdib/62733464083.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/aptitude_bank_exam.pdfIn PDF document text
    • http://hotita.space/1795489183agnkz.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/l_anatomie_humaine_cours.pdfIn PDF document text
    • http://fb-copyright-help-from.com/tapadonesanikixobosi779g.pdfIn PDF document text
    • http://ita-talia.fun/fikoda63ojc.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/ljhRfha/zexumuxoxuwijafuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/dizirajeb/FWibjij/ice_air_hockey_pucks.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxonavi/EIoWjf0/32807309287.pdfIn PDF document text
    • http://dokojekiferej.mygamesonline.org/67105708240.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/djahb5E/xofalavifunosoto.pdfIn PDF document text
    • http://ctuxuu.com/64802215081i52g8.pdfIn PDF document text
    • http://trokot-shopnew.online/maze_runner_book_or_movievgcvg.pdfIn PDF document text
    • http://medyayazilimtr.com/the_book_called_thank_you_mr._falker1ckik.pdfIn PDF document text
    • http://repochka.site/51359025311t901o.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/iOzEjQJ/66839868468.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/happy_birthday_banner_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_874d0fd3a69340c5a86825bb0aad6f49.pdf?index=trueIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_99e5c147ab0448b6a7c793d03716f2c3.pdf?index=trueIn PDF document text
    • https://db6d3479-2aeb-4a59-914c-1f55c48648c8.filesusr.com/ugd/9f5433_1c11b850a71d46dcb87ec2f37ef61fce.pdf?index=trueIn PDF document text
    • http://lugenizuridaj.atwebpages.com/the_bluest_eye_summary_chapter.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE631 4576 bytes
SHA-256: cb23d6444674a0d6d99bfba1d0f44547ccfa8e7f3a7a12560fccac3383d29b51
font_01_sfnt_off0000f5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BB 10948 bytes
SHA-256: 1b8ec5317cdc8d760b596376bf81979fc6dd8453873febca849717c7c7bc8e08

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