Malicious PDF — malware analysis report

Static analysis result for SHA-256 384addb3ca93c9c7…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 18:37:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6b69bdce997ff56c6b00ba1a8f21dddb SHA-1: 0df0b2fe1a2a2b1ca05b095c12a6b61399feeda9 SHA-256: 384addb3ca93c9c7006bda6264032a319aeef6bfeab2444148afa8640b11fe5a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to redirector domains, masquerading as "free generator / game hack" lures. These links likely lead to further malicious content or phishing pages. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links supports a high confidence assessment.

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-spins-coin-master-2021-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/easy-way-to-get-robux-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-mechacubes-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-2021-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/dayz-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-i-m-not-even-kidding_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/does-roblox-give-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-tool-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-fast-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-mod-apk_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-free-giveaway_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/elite-roblox-hackers_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/promo-codes-for-free-robux_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_off00003036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3036 22648 bytes
SHA-256: a6c76753c90f9d8c8c3e5d880df631597581456418d5f9a20c70fc3ad414426c
font_01_sfnt_off000062db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DB 18576 bytes
SHA-256: 461056571ca453647e3c969961301e9f27cf934f5ba6ca99c4dfe7c56792b440