Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a454ed6fae9ef59…

MALICIOUS

PDF

44.5 KB Created: 2021-05-17 09:39:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 23789670db9550519b9c3596d9b29511 SHA-1: 961ef31e449f908c4b998da2fb8d5ec2a882ef9a SHA-256: 8a454ed6fae9ef59a1c9ea8be1254343ce776dce73d6f15a6b61b05c7065dd79
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 0.9632

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/406889139/how-to-hack-coin-master-without-root-game-hack PDF link annotation
    • http://poltekkeskhjogja.ac.id/images/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://poltekkeskhjogja.ac.id/images/get-free-robux_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_003_off0000493c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493C 24320 bytes
SHA-256: b10315c80771b93eee78871d6382d7820ec756b90ee19bb1072dec7beb009fce
font_01_sfnt_off000080e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E6 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off00008b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B10 18384 bytes
SHA-256: 737d2cfdb9b4b1cff5b2208f55c42f49b9f58f49348aca7b669208ba5fc29a16

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