Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df85cfe39ca7ade…

MALICIOUS

PDF

33.0 KB Created: 2021-07-05 02:15:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 41cbf87737f4af25ba40c459d86e9ec0 SHA-1: 85376631b109231a44ce045fdde6142599dde718 SHA-256: 4df85cfe39ca7ade3f683dde5b89a367698ebd620aff2604b3a20f0ef70dd8a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action button, all directing users towards a lure for game hacks and free currency. The primary link, http://netcdn.tw/app/431946152/roblox-hacks-2021-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/roblox-hacks-2021-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/hwo-to-get-free-robux-with-out-hacks-or-illeagley_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-one-piece-millenium-hack-no-script_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-roblox-scibt-pack-exploit_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-v6-5-free-download_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-but_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-roblox-itesms_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/comment-devenir-un-hacker-sur-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/simple-hack-com-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/pison-club-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-jailbreak-outwitt-hacks_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-free-muscle-shirt_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-admin-roblox-script_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-without-human-verification-on-pc_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_off00002ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE6 22176 bytes
SHA-256: e45b6e12607eada61e5fae326c0fec48166b23bb18fffeb6a55dea8eaa368913
font_01_sfnt_off00005c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1B 19056 bytes
SHA-256: a827687bde1c23907f75db23928d8c544c1849638492c2c48bf6e5fa6ea38882