Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6a516ce18c9b8f…

MALICIOUS

PDF

48.7 KB Created: 2021-06-09 04:07:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e0e7d462515174467c3fece102724131 SHA-1: 7b6c74ddee9636cc00effcaf17fea9b2864c13e6 SHA-256: 5a6a516ce18c9b8fa46d1c9189a8cef891b49a7f4e019ce3969be2727f399c4b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-get-free-robux-no-scams-2021-game-hack.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.tw/app/431946152/how-to-get-free-robux-no-scams-2021-game-hack PDF link annotation
    • http://uilis.unsyiah.ac.id/ebook/repository/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/would-you-get-banned-from-roblox-if-you-hacked_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/get-free-robux-now-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/bunny-face-mask-roblox-free_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-avatar-roblox-girl_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/robux-hack-sin-verificacion_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-spins-coin-master-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005177.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5177 26332 bytes
SHA-256: dbb59d39352395bae2dc6f62688afae73030b188691beaf46b4d77de66d28d6d
font_01_sfnt_off00008e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E67 2984 bytes
SHA-256: 8f93d15c0fb8f2565e180fd089869ff37d12ea73b44d69d50418bd46b542fadd
font_02_sfnt_off000098bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BB 19172 bytes
SHA-256: e00276212bda9d4bbdd8a488b8faea42315310cbecb59b970b460cc69a080c7c

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