Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f266933330ed08…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 09:38:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: aa5673865c22dd855c4651568622366e SHA-1: fe68c02d927aed4dad9b29a81a5156662f28a344 SHA-256: 85f266933330ed08e848bc9f0a51ecf96d021a73efdaa75a8869d05238001362
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.online/app/406889139/how-to-hack-coin-master-without-root-game-hack PDF link annotation
    • http://itc-nekretnine.hr/files/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/robux-in_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/i-want-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/pokemon-go-free-stuff-codes_GM1094591345.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ee3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE3 25776 bytes
SHA-256: c6a0a329e77290a1691dd9020e44e820958add0d8dca7b79147c13e363751595
font_01_sfnt_off000089a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A4 2932 bytes
SHA-256: 7aee9e503a5ce204a8a322bb3f7914cecf17d3f4dda4772d0d3ff378ba95a3d6
font_02_sfnt_off000093cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93CC 18384 bytes
SHA-256: 737d2cfdb9b4b1cff5b2208f55c42f49b9f58f49348aca7b669208ba5fc29a16

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