Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e88db28123fabe6…

MALICIOUS

PDF

44.7 KB Created: 2021-06-09 00:13:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f130563d8aedbeb993c9bd84e01e359f SHA-1: 0a565b70f86857305195e1d23a97157f655e5237 SHA-256: 7e88db28123fabe6f739da1537e4b230d1aa87a98bb14a8f8954c8a4a0ab6d61
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links, with a high-confidence heuristic identifying a lure for 'free generator / game hack' content. The primary IOC is the malicious redirector URL, which likely serves as a gateway to further malicious content or downloads. The document body, though heavily obfuscated, contains references to game hacks and URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/hackaron-robux-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-roblox-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-roblox-2021-august_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/account-stealing-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-blogspot_GM406889139.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_off00005079.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5079 25800 bytes
SHA-256: 31ed5114dbc813716ca79f6c4029675430121f4ea3ffec5109848df38be30bbf
font_01_sfnt_off00008c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C06 18248 bytes
SHA-256: 1f137c3484557ed1c0b7e35c538fb3e3fcb60030b48c44961edd70cc24773911

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