Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b555135350166b…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 18:10:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6b77ad5040b6d7ae37702321fe246fff SHA-1: 46cb413d4966f8dda1c62a9392f53708b74a5542 SHA-256: 41b555135350166b303e679c93cf5927d4af9edba8f4fb122380f60aa7ab7f93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, disguised as offers for game hacks and free in-game currency. The primary lure is a link to 'free-game-pack-with-google-play-coin-master-game-hack'. The document body and embedded links strongly suggest a social engineering tactic to drive traffic to potentially harmful websites.

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/free-game-pack-with-google-play-coin-master-game-hack In PDF document text
    • http://techmobil.pl/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/roblox-free-accessories_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_off000047b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B2 25004 bytes
SHA-256: e77646b1404776c4ce8f31389171d8adf715549414147189de5a8896178918d9
font_01_sfnt_off000081a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A4 19200 bytes
SHA-256: be98b09ab2c06fbf73b0f12808a7bd14d726d15742b97e619ffca2063d62e21c

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