Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac68d5d5b88fdc60…

MALICIOUS

PDF

240.3 KB Created: 2021-07-05 20:52:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6cd0f39402ac9779a6fcc5d7f94702ef SHA-1: 27a1f17e6d7579aa2e5d9e7d922131e2f7bcfe86 SHA-256: ac68d5d5b88fdc6005eddfbd0fdc3847c57f330d2d87cc5a5fce3745d21afd1c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, designed to lure users with promises of game hacks and free currency. The primary link, http://netcdn.tw/app/1330123889/pubg-uc-20210-game-hack, is associated with a game hack lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a potentially malicious website for further exploitation.

Machine Learning

  • Nyx PDF Classifier clean score 0.1943

Heuristics 3

  • 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.
  • 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/1330123889/pubg-uc-20210-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-tix-robux-hack-download_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/all-black-roblox-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-robux-20217_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-hoodie_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-consigue-robux-gratis-hoy_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/is-ahmad20218-being-hacked-im-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037ca2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37CA2 25928 bytes
SHA-256: bd4824ac4fdd2f826db4e22703a016b7b9827d69dd2ea66a15de5a50d8a9392d

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