Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5332eca264a9e4…

MALICIOUS

PDF

36.5 KB Created: 2021-07-05 09:32:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7ac44f22805a275d24e576091f34abc6 SHA-1: d24a70ace9606072ba952ba97440ce0032af8366 SHA-256: 8b5332eca264a9e4b437f578af91a3037583cb30ba9249ae8e07393842cf7d2b
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 0.9886

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/daily-coin-master-game-hack PDF link annotation
    • http://smkn1salatiga.sch.id/library/repository/get-free-gift-card-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-free-play-demo_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-free-gear-items_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/unlimited-robux-cheat_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-money-on-lumber-tycoon-2-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-hack-rabbit-simulaator-2-on-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/websites-that-give-u-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-hair-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-clothes-on-roblox-2021-ipad_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-cheap-hack-buy_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-get-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-create-texture-hack_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-on-roblox-ipad-only_GM431946152.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_002_off00002f97.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F97 22468 bytes
SHA-256: 3676c791b6645d3189f09a0534ac0a562466f2b38f8c8de0f028226d0895e8cd
font_01_sfnt_off000061c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C5 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAA 18256 bytes
SHA-256: 4b4ebf8e9dec0048657ccfe2daaf89c536ab9e799ac439a9c3dc84db67dbacbd

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