Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c0f22df7615ee1…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 07:27:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a317e1dabb612a0923784df738c656b4 SHA-1: 6e986e381500a55b8e4e64ae062a26ea88fca571 SHA-256: 16c0f22df7615ee1425dc1a7b1939dc86eb7f1f97f465268cab5810761b44745
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/mcpe-master-unlimited-coins-hack-apk-game-hack, which likely leads to further malicious content or malware downloads. The document body and heuristics indicate a social engineering tactic to drive traffic to these malicious 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/mcpe-master-unlimited-coins-hack-apk-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/this-group-gives-free-clothes-robloxs_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-spamming-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-accounts-2021-may_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/asshurt-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-roblox-limiteds_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/anarchy-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-works-no-surveys-no-human-verification-code_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/upgrade-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-cars-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-2021-pc_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/game-cards-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/the-quarry-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robuxtoday-2_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
font_00_sfnt_off0000310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310C 22968 bytes
SHA-256: e97ad86e47d8bec226fa37ad5c0f336116b3586451899cbbb0642278cc9eda1f
font_01_sfnt_off000064cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CD 18876 bytes
SHA-256: e10fddf66f187be0e2cb1475a5dd66f9239aae3dc3a045fd3ebb4bdfa1b57169

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