Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c54d82108acfd82…

MALICIOUS

PDF

41.6 KB Created: 2021-05-14 11:06:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c1016732fff9ba522c21411322e23acc SHA-1: d68a49ca7831c373cf4aa8927d9d671a0f4ea4e5 SHA-256: 8c54d82108acfd827ec4cdb8c187cb136e9d4a295944f85a6f0719d5e844a433
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, including one advertising a 'Coin Master Spin Hack'. The document body and embedded URLs suggest a lure for game-related cheats or hacks, which is a common social engineering tactic. The primary function appears to be redirecting users to malicious infrastructure, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-spin-hack-no-verification-game-hack In PDF document text
    • http://apx-centre.ru/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-roebucks-in-roblox_GM431946152.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_003_off000047f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F8 24740 bytes
SHA-256: b7c1602cdfd21d84d97fa9df53f91e3ee417bbf6936faaedc07c53e2da7819a8
font_01_sfnt_off000080d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D4 18028 bytes
SHA-256: 2de0e9c41ce50443ccbc7b49ff620d9d14c87888ef748e70805f38b18b312090