Malicious PDF — malware analysis report

Static analysis result for SHA-256 092206c5f7e0848d…

MALICIOUS

PDF

43.7 KB Created: 2021-05-12 07:04:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3ac185b0c9bb0fa99854fb2ac737dcd6 SHA-1: 98f3b3457da60ba679563bce8ba9f91626dfad7e SHA-256: 092206c5f7e0848d6446dda6fe7caa8057ba96291cec6afe3e17d011a3ac4661
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free coins' for 'Coin Master' and other games. The primary lure URL is https://netcdn.xyz/app/406889139/free-coins-coin-master-2021-game-hack, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to game hacks and the same malicious URL, reinforcing the phishing lure.

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/free-coins-coin-master-2021-game-hack In PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/robux-offers_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/earnrobux_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/free-roblox-executor-no-key_GM431946152.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_off00004e98.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E98 25484 bytes
SHA-256: 5fa58cfe5e4b9ca1e3dde88e30e028e99cf5fec37bedb64351498c6260c57c41
font_01_sfnt_off00008927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8927 18112 bytes
SHA-256: 0727bd4027d3f5eec951b181c2bc31ee4d98e10eed2c862aff41d240a04f60ea

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