Malicious PDF — malware analysis report

Static analysis result for SHA-256 19faf9d75cf1b577…

MALICIOUS

PDF

52.0 KB Created: 2021-05-16 21:43:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 91d8f74fdc3ba327db7df53dcad94205 SHA-1: aed3568b16ef7c13d4a7e557e2f31c4c855358ce SHA-256: 19faf9d75cf1b577b53095883ead7c0490a4d7f69bd4b740d596deb577d7891f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to scam websites, specifically advertising free in-game currency generators and hacks. The heuristic firings confirm these links point to known malicious redirector infrastructure and a lure for game hacks. The document body text explicitly mentions 'Free Robux Generator 2021 No Human Verification Or Survey' and includes the malicious URL, reinforcing the phishing and scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8646

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 https://netcdn.xyz/app/431946152/free-robux-generator-2021-no-human-verification-or-survey-game-hack In PDF document text
    • https://kimolos-link.gr/images/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/get-robux-com_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-deals_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/robux-generator-com_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/earn-roblox_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-robux-website_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-coins-and-spins-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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d36.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D36 26284 bytes
SHA-256: d8b24bf98ae0ac01da27688141a62bb8c31359b2e7bd6ff83469f7b33be64f1a
font_01_sfnt_off0000899c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x899C 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00009359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9359 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_03_sfnt_off0000a4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C9 19556 bytes
SHA-256: 76adbda1d3e57e3064df3e292cf485a94c26c1a96e5d3a4e3c484cd1a4e129d0

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