Malicious PDF — malware analysis report

Static analysis result for SHA-256 99afd6a0a5beac97…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 18:40:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4ed289a76c26dcee6f1958827b5e1ffc SHA-1: aedcc2772992bff323bc7d9cc3175a9c1dee879f SHA-256: 99afd6a0a5beac975bce14f3e1819ff9a49b68e9bdecd06569dfc78f33601d74
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/hack-de-coin-master-game-hack PDF link annotation
    • http://libsmpn1balongpo.sch.id//repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-hack-gg-uardikan_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/how-to-hack-2021-acc-roblox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-no-hack-robux-generators_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-coins-and-spins-link_GM406889139.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_off0000335c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335C 22860 bytes
SHA-256: dd70bc810ab5f80777f1aa420f36e9c8124b2705af840738e026b62f2118ed41
font_01_sfnt_off00006697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6697 18172 bytes
SHA-256: 0e33140dfea2d696e3e0498e070f458cdf791fb8801a8c8617219b77f7bfe610

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