Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c9dcd9cbaf4119…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 07:44:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a27c1bf5d0678e283feca41892ee7cc5 SHA-1: 086f5cd3ea816d1ff3c1a1e93daf8075079828e1 SHA-256: 79c9dcd9cbaf41198e866f28dfe7364c5cc21a6610dbcbed5e9afe269b496c47
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and free currency. The heuristic firings indicate that the PDF is designed as a lure, likely to lead users to a site that may host further malware or phishing content. Although no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest an intent to exploit user interest in games for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/link-for-free-spins-on-coin-master-game-hack In PDF document text
    • http://library.umla.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/jailbreak-roblox-hack-money_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/tiktok-free-no-download_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id//repository/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003047.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3047 23292 bytes
SHA-256: 6c76ded759d934d068d9606e7514d117b2dfff74879b1b650317ddac11358717
font_01_sfnt_off00006410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6410 18344 bytes
SHA-256: f56b0ea85f0f4ceaa4b3226630b5e27c33b435ed9466ab3582cda34df5208c0a

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