Malicious PDF — malware analysis report

Static analysis result for SHA-256 061337689bfbc573…

MALICIOUS

PDF

82.6 KB Created: 2021-09-18 15:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d2eb61e531d47fa3fc3b092c230568aa SHA-1: 5103d5c734dc8378b20d4f2fca0e3bc56956d745 SHA-256: 061337689bfbc57355162b0511f9ddab4c4318bc2f88b592c94075208a722064
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically flagging it as a link farm on disposable hosting. This suggests the primary purpose is to redirect users to a network of sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/98489685681.pdf In PDF document text
    • https://wildnaturetravel.com/File/dobewadogepo.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/lufefa.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/73274687087.pdfIn PDF document text
    • https://euinsuti.uniluxgym.ro/app/webroot/files/userfiles/files/xotiropimarubor.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/88730411257.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/lawimopisimovavenajibe.pdfIn PDF document text
    • http://llux.vn/uploads/files/81764879966.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/kipiv.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/balupujiv.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16136d3762e27c---65501916913.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/51156623778.pdfIn PDF document text
    • http://inkjetartandimage.com/Uploads/file/43397223949.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/94893667177.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/venutowilofebefemawap.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/87754622190.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/28294707820.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/60373644777.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/49392924556.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/poboxepejobetolipilokat.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/metegofopagunoxazubarugak.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/tipepokakun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=dragon+mania+legends+mod+moneyPDF 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_off0000deab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C2 10608 bytes
SHA-256: 4e41229681d762beb13bae29cba830d34cb9de44d88593c8378d1cc1097a5326
font_02_sfnt_off00010ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 17904 bytes
SHA-256: b695094132486160ef52701e4f3fbdfb9dd040a98aaf0471114de94f3e3d47f2

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