Malicious PDF — malware analysis report

Static analysis result for SHA-256 758e349ab7b22314…

MALICIOUS

PDF

45.4 KB Created: 2021-05-12 14:16:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f6a981e3d5a55524ebb758f7375c7a6a SHA-1: 2a8dfa243195abe8927f2790462a32422de06e6e SHA-256: 758e349ab7b223140b3e0ae0b0f5b3e9afecadd71b2c2d7d1775ed4b02fd1158
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'Coin Master' hacks and generators. The heuristic firings confirm these links point to known malicious redirectors and are designed as lures. While no scripts were explicitly extracted, the PDF structure itself facilitates these malicious redirects, likely intended to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-hack-game-game-hack In PDF document text
    • http://enosiderma.gr/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/give-me-robux_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/woman-roblox_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000489b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489B 25932 bytes
SHA-256: 61685ace007210c4c66249a641261ba530f1cddef113e0013a5beb09de88a88a
font_01_sfnt_off000084e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E6 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off0000900f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x900F 17976 bytes
SHA-256: a10cba9c8785de960fed0da4a3eab1918984567c97134b904b56a350c269fc22

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