Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1d18ef8eac4311…

MALICIOUS

PDF

32.5 KB Created: 2021-06-29 12:39:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 98df02a5d45adc7120d2a8487aae0301 SHA-1: 0db3a2d3778fbd0f26d281b5fa92a8e786e5e723 SHA-256: 7c1d18ef8eac4311a24f53466bcc47a6e247fd2dc7964979f1892b0a20e4195e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free generators, directing users to a known malicious redirector. The document body explicitly contains the URL http://netcdn.co/app/431946152/how-to-get-a-free-t-shirt-in-roblox-game-hack, which is flagged as malicious infrastructure. This indicates a phishing or social engineering attack aimed at tricking users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/how-to-get-a-free-t-shirt-in-roblox-game-hack In PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-pocket-edition-free-download_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-robux-for-free-2021-without-builders-club_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/instantrobux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/hacks-for-hhcl-hockey-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/chloe-games-free-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-free-book-wings-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/hotel-empire-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/get-free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-robux-diy_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-free-robux-on-ipad-mini_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-glasses-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/download-hack-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-robux-that-actually-works-no-gift-card_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-51-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/gear-hack-roblox-building_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/minecraft-pe-015-0-apk-free-download_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
font_00_sfnt_off00002b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B38 21504 bytes
SHA-256: 80e32a1ec776c5e615440511ad5ca940e5d10ba4210b4b25e850b7d4e302429b
font_01_sfnt_off000059d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D5 19204 bytes
SHA-256: a0542ec820777680c3711e72a097dc1445a6965482fd8efe17731cc424974918

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