Malicious PDF — malware analysis report

Static analysis result for SHA-256 9675adfbb46c5d5d…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 10:04:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6614f8147df7f792681ca264d2de30dc SHA-1: bcb91c54c0c1a17b817c4b1d66ff0f95a1bb8ee0 SHA-256: 9675adfbb46c5d5dc5fe230edda6ba5a459b2d0333e8541f77d62a3040a0f159
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. These links redirect to malicious infrastructure, specifically http://netcdn.tw/app/406889139/coin-master-hack-mobile-game-hack, which is flagged as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-mobile-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-granny-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-obc-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/everything-on-the-roblox-catalog-free-fast_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-robux-descargar_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/https-webrobloxcom-catalog-202163-hair-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/easy-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-vampire-hunters-2-wall-hack-how-to-do-it_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-hack-robuxian_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-net-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/troll-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hacker-beta-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-tix-in-roblox-pokemon-brick-bronze_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-como-tener-robux-gratis_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003329.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3329 23744 bytes
SHA-256: 678f7696228e6d3c3f54a677a6274d372d083fd59d5ac1c44ea20e038baa9fe8
font_01_sfnt_off000068b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B3 18236 bytes
SHA-256: 6a735436479ff0aab11f95a41c40e0b9404f26c9454ddfcce58982a18e600178

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