Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e3f46a915b2e807…

MALICIOUS

PDF

43.3 KB Created: 2021-05-11 08:40:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b5b1dc78b01bbb3583366ea5214a56bd SHA-1: 8330bd1cc1681e73055fee7ad33cefe72694f1a2 SHA-256: 7e3f46a915b2e807fe9c7d690d6c37c5ee1a1fb78dcc4bb1819f8b3726ae35d3
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 'game hacks' and generators. These links are designed to lure users into clicking, likely leading to further malware downloads or phishing attempts. The ML classifier also strongly indicated maliciousness.

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/how-do-you-get-free-pet-food-in-coin-master-game-hack In PDF document text
    • https://successfulauto.ru/images/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/robux-free-co_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://successfulauto.ru/images/roblox-free-clothes-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_off00004a0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0D 28984 bytes
SHA-256: 47fd7951e6378ec2c864867d6f081011362e068eea921e70c9d8655fe28277a9
font_01_sfnt_off000085e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E4 18672 bytes
SHA-256: cff39daf026dc40ed6ecaa9210f7f2c1a86de44fdb8191942dcd9a9d80f52395

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