Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f841b330146405…

MALICIOUS

PDF

46.6 KB Created: 2021-05-16 06:02:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 31a4735d59f93e0e43da2857454a237a SHA-1: bfb80c5d9d08c587e17c75d8d675ea3d4426a98d SHA-256: 10f841b3301464051e209adbbdd0942106cfdf1b66e056c89440641697bd0f63
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors, masquerading as "free generators" and "game hacks" for popular games. The primary malicious link identified is https://netcdn.xyz/app/406889139/google-play-coin-master-free-spins-game-hack. The document body and embedded links suggest a social engineering tactic to lure users into clicking these malicious URLs, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/google-play-coin-master-free-spins-game-hack In PDF document text
    • http://w-i-r.de/images/coin-game_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/wurst-commands_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-spin-hack-no-human-verification_GM406889139.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_off00004c71.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C71 32260 bytes
SHA-256: 455fc3ffca17f47dba151a78ba214c77fbd5acf469c7fafaed2801aa891125a1
font_01_sfnt_off00009340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9340 18580 bytes
SHA-256: 159b8c9b1a2eefbbab3f5eb8e11562dfe96c3187e7709bb0bd16e4420bc442bb

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