Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d08ebbe58c6f3f…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 02:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d99fe91d9bf9360dc9fd36e8f14a6500 SHA-1: 2bc7965426a34bc66bf053c30c80c33cc976c005 SHA-256: 42d08ebbe58c6f3f9e5ed706d543de760d3147cf3fa3a3e12e1bca750057b6c4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one heuristic specifically identifying a link farm on disposable hosting, suggesting an attempt to obscure the final malicious destination. The presence of 'pubg lite download hack' in a URL suggests a lure to attract users interested in game exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bacsiha.com/public/ckfinder/userfiles/files/xurajat.pdf In PDF document text
    • http://mini-garden.ru/userfiles/file/8976502823.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/xeposuzekemuw.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/geduwopom.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/98618018435.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/63411035969.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/32422978244.pdfIn PDF document text
    • https://keongracun.org/contents/files/88422442316.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/momojuvuvakam.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/99837500563.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/babebiwuwatarinarakogixop.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/hnc3ochejr1ndeglkbe765mec6/55375324365.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/9821737757.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/fejemadadagifewimijisuzi.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/pipirakelu.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/75921085618.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/88164189574.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=pubg+lite+download+hackPDF 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_off0000df56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76D 10800 bytes
SHA-256: f8f4f0988a10a31e39181d3d4246954b439edb0b453ba8b2b04c32b3e0aeda6a
font_02_sfnt_off00011010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11010 18320 bytes
SHA-256: 206cdbac27b3e8f310df66f26bb9f5e4ced95664ccfad52358ee15a642e095fb

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