Malicious PDF — malware analysis report

Static analysis result for SHA-256 6725155793b30a43…

MALICIOUS

PDF

46.5 KB Created: 2021-05-11 05:00:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6932d3632cd419feaaa430968bc29bec SHA-1: c175a80e6d39436c31db429e0e3e4ec520c00a9d SHA-256: 6725155793b30a430ce1d17f683290cbb13c6c542fcf43e98406c8e2f731f474
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for 'free Robux' or 'game hacks', a common social engineering tactic. The embedded links likely lead to further malicious content or downloads, suggesting a downloader or redirector functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/free-robux-websites-that-work-game-hack In PDF document text
    • http://instrumenttut.by/images/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://instrumenttut.by/images/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://instrumenttut.by/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://instrumenttut.by/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://instrumenttut.by/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://instrumenttut.by/images/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • http://instrumenttut.by/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://instrumenttut.by/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://instrumenttut.by/images/coin-master-free-spins-and-coins-hack_GM406889139.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_off000049e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E9 26316 bytes
SHA-256: 9de474cdd37fafa797b90233f196c270fb6a671e0d37807389ff695c70aa75aa
font_01_sfnt_off00008756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8756 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9140 19000 bytes
SHA-256: 7385cf8e30761df55e83d9792ae8d47179260988159899b0069d718a962ca50a

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