Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a4cc04391bf819…

MALICIOUS

PDF

91.5 KB Created: 2021-09-12 22:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09327492842ceb36b5cd84a6b52833bb SHA-1: d0370dd9bfd81f00cc036ad17bef9448d26ab9f0 SHA-256: 90a4cc04391bf8193479688cbe6bfc5e9327eb35ed1cc6e2202843cf133c6f3c
94 Risk Score

Malware Insights

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

The critical ClamAV heuristic identified this PDF as a phishing trojan. The PDF contains a large number of external URIs pointing to various PDF files hosted on different domains, indicating a link farm. The presence of 'utm_term=dream+league+hacked+version+2018' in one of the URLs suggests a lure related to game hacking, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3565

Heuristics 4

  • 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
  • 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://aradovan.com/userfiles/file/65778015159.pdf
    • http://studiozammuner.eu/userfiles/files/22424752547.pdf
    • http://tofuyatogo.com/uploads/files/pokusutiseko.pdf
    • http://sinching.com/uploadpic/files/202109031450469258.pdf
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/gejarovexonoxivapofagoz.pdf
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/wutivixukikabejuk.pdf
    • http://angel-conference.org/upload_fck/file/2021-9-2/20210902064505209108.pdf
    • https://crcnueva.naturasoftware.com/uploads/images/files/92927275575.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613155c7cecde---bikizufipogaji.pdf
    • https://birotex.rs/images/files/ratezarafakaz.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-9-1/20210901132749719463.pdf
    • http://24cvety.ru/upload/files/zinugokadokatixaveremizi.pdf
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/lobanizebufadefodotesunug.pdf
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/69619383954.pdf
    • http://share-world.tw/userfiles/file/9936006784.pdf
    • https://luckysurface.itweald.com/uploads/files/613d248b4c925.pdf
    • http://haai.org/upload/file/jetapopidedaxogedobap.pdf
    • http://canadianartistic.com/userfiles/file/46654049158.pdf
    • http://vangphutai.com/images/uploads/files/kotogidazodimekirira.pdf
    • http://viswinkelindex.nl/images/uploads/bilomupelazo.pdf
    • http://tvoirostov.ru/ckfinder/userfiles/files/somalisasesibazuzatu.pdf
    • http://qwerty.pl/_data/file/65554932374.pdf
    • http://bangtaisay.com/uploads/userfiles/file/64141785740.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=dream+league+hacked+version+2018
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e11.bin
5919b10452b1533f400a2f142a3f3f3fd5fd11a23bfb6fd418265f72aaa8b701
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E11 11480 bytes
font_01_sfnt_off000148ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x148EA 16792 bytes