Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fdba7500329595b…

MALICIOUS

PDF

43.6 KB Created: 2021-05-15 04:32:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9343eb59a8aa576587c59ec45e29e88f SHA-1: 5302610187a956864ab521cf241decff6bffd2b6 SHA-256: 9fdba7500329595b365c73f3c4fa62cee9c3f7d2bb279f045f4afdc59fcc787c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free currency'. The heuristic firings confirm these links are associated with malicious redirectors and lure users with game-related content. While no scripts were explicitly extracted, the PDF structure itself facilitates these malicious redirects, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-apk-2021-download-game-hack In PDF document text
    • http://balkanin.com/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-hack-ios-2021_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_off0000473b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x473B 29496 bytes
SHA-256: e772cf2d1b2c60013f6ea1c1d2fe48a103e6bcba0efb4c5ae23d3055266ea38b
font_01_sfnt_off0000861b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861B 18876 bytes
SHA-256: be5be3eecf441f83945d2891df9f868a1d3a5dfc921b9d485f27c984001e53f9

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