Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dbe1f1cc9a10d1…

MALICIOUS

PDF

44.7 KB Created: 2021-06-09 01:27:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d82bec11a5425f99f6213224fb764437 SHA-1: 5e83f74b98215c14cd423d7f2b200d13d574e729 SHA-256: 74dbe1f1cc9a10d154e9e520ead18211db32f09808c17c072da536f05ca8a3f7
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and cheats to entice users into clicking embedded links. The primary link, 'https://netcdn.tw/app/431946152/roblox-ben-10-cheats-game-hack', is identified as a malicious redirector. The document also contains numerous other links to potentially malicious PDF files hosted on 'library.feb.unila.ac.id', suggesting a campaign distributing malware or phishing content. The presence of a download button lure and password instructions further supports a malicious workflow, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/roblox-ben-10-cheats-game-hack In PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/pubg-90-uc_GM1330123889.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-earn_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_004_off0000536c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x536C 24332 bytes
SHA-256: ff45876445b3aba7c470c5ab0957e92fdead4e2fc8a3b408cefac5ecc6465ab4
font_01_sfnt_off00008b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1B 18560 bytes
SHA-256: eb4cb9abd172849f3dee3845e0091c8b460f32dee037b60094d51c88ee59faca

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