Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6dec600e41229fc…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 05:23:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b924deb16f4b426fc05390953f85eee8 SHA-1: 0ed41d5b7631f76d8da619d877ae25c34068841c SHA-256: b6dec600e41229fc4d2dff97e01e5e464e9b8276cbbb8eb55e65a1c900631374
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, specifically http://netcdn.tw/app/479516143/play-minecraft-free-online-no-download-game-hack, which is presented as a lure for free game hacks. The document body and embedded URLs reinforce this theme, aiming to trick users into visiting the malicious site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/479516143/play-minecraft-free-online-no-download-game-hack In PDF document text
    • http://library.umla.ac.id//repository/pokemon-go-free-bonus-box_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id//repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-hack-2021-september_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/dress-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/play-roblox-for-free-online-now_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-roblox-account-generator_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_off00003365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3365 21696 bytes
SHA-256: 23bf4bfadbb7977f63b79f548d435310f7a6d024ddd9523b78d71af3f2ddd334
font_01_sfnt_off000062e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E0 18912 bytes
SHA-256: 346cb213616b37d36555fcb51ba59473eedb80dae61f7accaa613951a8f90450