Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce78be75b1f2e7eb…

MALICIOUS

PDF

57.1 KB Created: 2021-06-09 07:07:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4b4ae357ffb6b718f54a84cb33ad8712 SHA-1: 6b5e0eeec63a0da18965635a98e786be84043480 SHA-256: ce78be75b1f2e7eb20086717b6254a558364375510bd2c50ff7cba6f4fd33c90
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to redirector infrastructure, specifically advertising 'game hacks' and 'free currency' to lure users. The primary redirector URL is https://netcdn.tw/app/431946152/how-to-hack-anyone-on-roblox-game-hack, which likely leads to a malicious payload or phishing page. The document's structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9560

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.tw/app/431946152/how-to-hack-anyone-on-roblox-game-hack In PDF document text
    • http://oca.undil.tl/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/freerubux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-redeem-robux-cards_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-at-freerobuxeu_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005464.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5464 26080 bytes
SHA-256: f6f9a812c6bcebdb7f4b7b514e93e64de6b8a3fbf9255b1f982c3fdf0d565a76
font_01_sfnt_off000090ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90ED 8376 bytes
SHA-256: 092b7a11ef2af93d0b61b37032e6f669359ea7bc5bcb682d43a712f599a5ca39
font_02_sfnt_off0000abb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABB7 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_03_sfnt_off0000bbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF5 18528 bytes
SHA-256: 9dd3ca48bcf42e91b68cfca83ab74313a0927a73de233ce7eff0b2a1354b03cc

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