Malicious PDF — malware analysis report

Static analysis result for SHA-256 3828915852e62dc0…

MALICIOUS

PDF

33.8 KB Created: 2021-07-09 06:27:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 921b0f27bb7a4993efdbbd7e73c684bc SHA-1: 5635fd60f8c6c1baa545fcfb2eff4c1d9eb4edb2 SHA-256: 3828915852e62dc0ff1cb0511d00423d12f915b2bb8c69ae1085a491a4a649bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The primary malicious URL identified is http://netcdn.tw/app/431946152/roblox-a-game-hack, which is associated with redirector infrastructure. The document body and heuristics confirm the intent to lure users to external, potentially harmful, websites.

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/431946152/roblox-a-game-hack In PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-hack-items-into-roblox-shirts_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/dragon-ball-online-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/hack-para-robar-cuentas-de-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/get-free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/all-cool-free-shirts-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-daily-coin-master-coins_GM406889139.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_off00003071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3071 21864 bytes
SHA-256: 57175e44d79bbc08a3e5cebc06a3a9dfe657dd417cda61eba0b2628ba113e69a
font_01_sfnt_off000060ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AE 18484 bytes
SHA-256: a95df912d9a51278cddf4d13674ad29103f5defba35cc7118de0a05d6b7c30a2

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