Malicious PDF — malware analysis report

Static analysis result for SHA-256 934c6e6a60a2dccd…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 22:39:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 983a7895dc4ee6db54f2e171da9fb8a2 SHA-1: 273e07b74444ff820a9cd8d622ccef9ce38eeaaa SHA-256: 934c6e6a60a2dccd6fe3b141f22bd1685ede5ecda30cfac2b2bb7d6929bba20f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to a known malicious redirector, specifically advertising a "game hack". The document body, though heavily obfuscated, contains URLs that align with this lure. The primary attack pattern involves tricking the user into visiting a malicious site under the guise of obtaining game cheats.

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/can-you-hack-coin-master-game-hack In PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/www-coinmaster_GM406889139.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/fbchampion_GM406889139.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://man2pamekasan.sch.id/__statics/gudangsoal/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.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_off00004c53.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C53 25104 bytes
SHA-256: 5662ef6f15dcfd8d1b851b8e0e5a748653537308ef7a0f27ef32da80d31d0815
font_01_sfnt_off00008555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8555 18020 bytes
SHA-256: 2a833d42ea66e9b84acb7b91147defd58d864c1bb9bc3ae4b7d787d82e58cd2a

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