Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71e2ec2b0d26e78…

MALICIOUS

PDF

43.8 KB Created: 2021-05-19 22:37:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc817ca2576b578917e0829ac76cb0c7 SHA-1: 57d32a8f01e37face75fb0054492ae67fffc57f8 SHA-256: b71e2ec2b0d26e782ada3f044d532257cd1923419c1e57200effb1fafcfafcf8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting a "Coin Master Apk Hack". The document body and heuristic firings indicate a lure for game cheats or hacks, which is a common social engineering tactic. The presence of multiple redirector links suggests an attempt to download potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-apk-hack-2021-ios-game-hack In PDF document text
    • http://cruzdelsur.ru/images/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://cruzdelsur.ru/images/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/roblox-free-hair-codes_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_off00004ef0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EF0 25100 bytes
SHA-256: 3a058a5770c753f720473fb8a17400c274345812010b01ef4adf91b4e2f09ab0
font_01_sfnt_off000088d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D0 18296 bytes
SHA-256: 279b0b1c893eba727ec0845632f3a3712edc40ddf848fb82c48fddf2681f3228