Malicious PDF — malware analysis report

Static analysis result for SHA-256 178005051fdfef61…

MALICIOUS

PDF

41.0 KB Created: 2021-05-11 16:30:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bc776a6b030d79cdf523fcf7db3cb998 SHA-1: 95594246d7db944a14060ee2c07beca4d6c618dc SHA-256: 178005051fdfef619bbd974050e6492d46f4c94a8932a9ee0dfb6d300c94c387
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The document body and embedded URLs suggest a social engineering lure to trick users into visiting these sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection campaign.

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-gold-cards-hack-game-hack In PDF document text
    • http://arch-centr.ru/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/how-to-get-free-shirts-on-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_off00004713.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4713 24240 bytes
SHA-256: 741e9c6da946a57f105d2d0ec87f2c061dd77e7e62085dd282ac98e046126e91
font_01_sfnt_off00007ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC1 17964 bytes
SHA-256: adb4edbf0c57abdeeb225f0bd422abdfe2e9b1ff4eb8b752c2c204cd3e2141b0

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