Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f83f429cf26bfda…

MALICIOUS

PDF

44.0 KB Created: 2021-04-29 17:05:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 58d6f9eab61ed80476fddbf0c05d1c6d SHA-1: 8388b74fc469850224ef989b5c128d2d1b00dd78 SHA-256: 7f83f429cf26bfdab71fdac4eb9f2c4bf6a0353b331b41536bef4183702f245b
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 0.9868

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.xyz/app/431946152/iron-man-simulator-roblox-war-machines-hack-lua-c-script-game-hack PDF link annotation
    • https://library.sdkmaterdei.sch.id/repository/free-tix-on-roblox-2021.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/hacks-para-dungeon-quest-roblox-2021.pdfIn PDF document text
    • https://library.sdkmaterdei.sch.id/repository/free-black-suit-roblox.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-the-ninja-animation-in-roblox-for-free.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/pastebincom-free-robux-code.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/a-group-in-roblox-that-gives-free-robux.pdfIn PDF document text
    • https://library.sdkmaterdei.sch.id/repository/cool-roblox-t-shirts-free-shipping.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/cheat-engine-roblox-hack-prison-life.pdfIn PDF document text
    • https://library.sdkmaterdei.sch.id/repository/free-hairstyles-in-roblox.pdfIn PDF document text
    • https://library.sdkmaterdei.sch.id/repository/unlock-my-games-free-robux.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_003_off00004102.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4102 25104 bytes
SHA-256: c80a6cfe556547b55cb527df6c2487b79757295e4d8d87d45ea419d4281f9d45
font_01_sfnt_off00007b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3A 3312 bytes
SHA-256: 40bd8eebcb3a0d68a8646f1930e84f30a44bfa48525263c6c528f0bc1e9c1677
font_02_sfnt_off00008689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8689 19544 bytes
SHA-256: e9f269416fe1f2839dcf8533febbd0f8ff853cbd5adbf4042b82f1c6a8fedef2

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