Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa8adbb98d4f9d3…

MALICIOUS

PDF

35.0 KB Created: 2021-07-08 23:32:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 20c3a1b15d81436fe8c0cd6625de469d SHA-1: 8b145046bef34062d10677006b51380c6e3fb13f SHA-256: 6aa8adbb98d4f9d3a295cf2281a7ba414d9a487bf5493a279c3db4a681edeb8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/best-minecraft-hacked-client-game-hack. The document body and extracted URLs suggest a lure for game hacks and free in-game currency, a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

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/best-minecraft-hacked-client-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-into-roblox-and-get-builders-club_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-instant-no-lie-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-name-change-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-players-download_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/comment-installer-un-cheat-sur-cbro-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-make-any-purchase-in-roblox-free-2021_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_off00003373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3373 22808 bytes
SHA-256: 921c74bf974c05c383facca119b9332205bcc140f3e745d4977d6e51c2074553
font_01_sfnt_off0000659c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 18492 bytes
SHA-256: 86296843b88eed25728c8cc075b43780ca1cc7c9d5e807804b99454961e5616a