Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a427f241b1257d…

MALICIOUS

PDF

35.0 KB Created: 2021-07-07 00:00:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 67dbe35313505a4093e8145fff7d745d SHA-1: f6f8ab0d7a0bcd6fc9eda3b00b988bed316b46d1 SHA-256: 44a427f241b1257d394ca40d54c8993e5ecd57fe95f87d652b16650d61e9e755
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The heuristic firings indicate that the PDF is designed to lure users into clicking these links, likely leading to further malicious content or downloads. While no scripts were explicitly extracted, the nature of the links and the ML classification suggest a high likelihood of exploitation or further payload delivery.

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/coin-master-links-free-spins-game-hack In PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-catalog-hacks_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/pubg-uc-ykleme-hile_GM1330123889.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/c00kid-roblox-hack-gui_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/easy-roblox-gui-hack-imouter_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-points-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-laser-tanks-20-cheats_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-hack-app-download-ios_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-wizard-tycoon-2-player-hack_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-hack-2021-real_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/minecraft-for-macbook-free_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_002_off000032a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A6 22928 bytes
SHA-256: ded245ab86410bf25653748d5e98696ede62d65f5864a9f63e21f34abe1ef226
font_01_sfnt_off00006610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 18344 bytes
SHA-256: 6ad1108e81c5525844192ddb13ab38111abd218b87fc7994796a13e0178d8bfd

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