Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb2263f12377def…

MALICIOUS

PDF

40.9 KB Created: 2021-05-14 18:33:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1e30ebd82f396878d50f91c02e109341 SHA-1: 34ad42d01e1c2896b5fa77cc1cd141fd60d2866f SHA-256: adb2263f12377def0c8b7a7bfa8296869fd463a4e9d66613902a000215f01a93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically disguised as a 'Coin Master Village Cost Game Hack'. The document body, though partially corrupted, also contains references to game hacks and free generators, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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-village-cost-game-hack In PDF document text
    • https://www.mrsz.ir/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.mrsz.ir/images/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.mrsz.ir/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://www.mrsz.ir/images/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://www.mrsz.ir/images/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.mrsz.ir/images/games-on-roblox-that-give-you-free-robux_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_off00004614.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4614 25204 bytes
SHA-256: 0ae9a60dee0463a04291ab086c822296e60fdff41066b51a7472c12ba1c6fc91
font_01_sfnt_off00007e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E03 18044 bytes
SHA-256: a8028c0297769aa7dba6e0a54b0a1dc6e5838f70d2f821663f5d8e8c2692d7c8

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