Malicious PDF — malware analysis report

Static analysis result for SHA-256 562b47f5ecbcc642…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 01:22:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2abb71294b469caefbb0e62f1bef4908 SHA-1: 238fa1c6cce993cbf6204cbbac00346383f42cdf SHA-256: 562b47f5ecbcc642d5f1e4fcf6d0e39cf8a6e15dba82cd001dd4720ea017e452
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 0.9980

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 http://netcdn.tw/app/406889139/how-do-you-get-free-pet-food-in-coin-master-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-in-claim-gg_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/best-way-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-no-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-anti-cheat-2021-script_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-hair-not-model_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/raindrop-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-sad-cheating-story-albert-he-cried-on-video-new_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003088.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3088 22004 bytes
SHA-256: 47f9b4d711428b2f744fc0c4703139b1b4b19a59882ced41efff5e8a9b9498da
font_01_sfnt_off0000617b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 18960 bytes
SHA-256: 9e03b029e376b531d63ae140c0287df0ed08580784c9ca8a104e51c253472481

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