Malicious PDF — malware analysis report

Static analysis result for SHA-256 2325c2da3f6bc431…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 12:29:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c5622d9ac0e65a804cad0dd18bbcb6c1 SHA-1: 6d4f82b314d5467bf1f4593d2166c27968ce6199 SHA-256: 2325c2da3f6bc431e11c2751b901bbbaa44f64e380517ded6e727b9aa07a55a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and free generators. The primary lure URL is http://netcdn.tw/app/406889139/free-coins-coin-master-today-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or social engineering attack aimed at driving traffic to 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/free-coins-coin-master-today-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id/repository/rogue-roblox-aim-bot-cheat_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/akuqo-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-free-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/new-free-items-on-roblox-promocode_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/escape-room-by-devultra-cheats-roblox-forest_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hspart-imahsimp-yhsbatch1p-pastebin-free-robuxtype-batch1q20212021shq_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hack-for-rubux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/www-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-cards-codes-cheating_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-make-hacks-with-studio-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-com-toys-free-codes_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/confiscation-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B4 22964 bytes
SHA-256: b3c59dae866a10f0334f9577b94de3df0bdd30b7cd59fa584713b8833f67b91f
font_01_sfnt_off00006595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6595 18352 bytes
SHA-256: a5bd84cc4c7de1c91a362ad902b00f54e7cd5c4c8ea3a16876296fc55094fa11

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