Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef09e7580e817b0…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 09:32:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 17bb5398996f843841e5aa4198a72bd8 SHA-1: 592ceeab6c9df2bd59c3c2cfc88c9d167bb82df0 SHA-256: 5ef09e7580e817b03a4da91d69dd1e964fdccee015a10b46293e3804572c9319
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that promise free in-game currency or hacks, such as Coin Master spins and Roblox Robux. These links are identified as malicious redirectors, indicating a likely scam or phishing attempt. The document body and heuristics strongly suggest a lure to trick users into visiting these sites, which could lead to further malware downloads or credential harvesting.

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/how-to-get-free-spins-on-coin-master-game-hack In PDF document text
    • http://arhi-z.ru/images/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://arhi-z.ru/images/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/coin-master-20-free-spins-link-today_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
font_00_sfnt_off000049a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49A9 25996 bytes
SHA-256: d54350c956f8532356c057add76717d34a105e7cd43430550609b2bd45728950
font_01_sfnt_off00008598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8598 18052 bytes
SHA-256: ea84a6236c2a6e621998df031dd6ced14717eafc49be4f8ccfac8b30b37a9d36

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