Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f683db2a6b6024…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 22:49:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6234151217372592074de18a72c8b10b SHA-1: aa0faba2e2dff6ee794cda1b393869fcea139073 SHA-256: 97f683db2a6b60241d48e3dd01754667e29d5809a223d420882e7ea2bfbf44c3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics indicate a lure for free game hacks and virtual currency, a common tactic for phishing or malware distribution. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/old-roblox-accounts-for-free-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/robux-miner_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/moon-active_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-roblox-on-macbook-pro_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-app_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-hosting-24-7_GM479516143.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_004_off000050ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50ED 25640 bytes
SHA-256: a4d77303255ad3f73b8aadc4113602289a717bcde96a2b321c70a0f201316c74
font_01_sfnt_off00008bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB4 18368 bytes
SHA-256: f0ce6b820c45e6e2988b5e2b6f1fd71f334d25f96e0178b7a1255a1417217111

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