Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b9f4b29222d52d…

MALICIOUS

PDF

52.7 KB Created: 2021-06-09 13:18:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 801d1e14f92323d0be5c9c59a9a6614e SHA-1: 602249d769b128f667a0d0a637f8050a555b1681 SHA-256: a6b9f4b29222d52d0a0fcab03d08d25f049bb3f155c530cbd1d9a43c84cc0e4d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of game hacks and generators to entice users into clicking malicious links. The high-confidence heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous URLs pointing to similar content strongly indicate a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the lure suggests the linked pages could host malicious JavaScript or initiate drive-by downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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.tw/app/431946152/pokemon-brick-bronze-roblox-hacks-game-hack PDF link annotation
    • https://razredna-nastava.net/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-official-website_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/hack-money-lumber-tycoon-2-roblox-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/www-rbx-com_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/pokemon-go-free-trades_GM1094591345.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D4 28500 bytes
SHA-256: 4f3fbd640c631050a504d482543b19139414d45465cd9a74cf5f5e80c457cff6
font_01_sfnt_off00009303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9303 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off00009cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB5 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9C6 18800 bytes
SHA-256: 9457de987baac5c58bfea66e609c62b0888482eefe7ffc410fc1b7ef12f26b42

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