Malicious PDF — malware analysis report

Static analysis result for SHA-256 229b921331693197…

MALICIOUS

PDF

47.5 KB Created: 2021-06-11 10:09:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bef07515b0fca87d849372cd2c56d159 SHA-1: 881bb90f237a8aa66e479ba7b22453ad2ff2b229 SHA-256: 229b9213316931971ea91bc2202486784cd60a3c2ea3931344220aecdca8e5df
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9769

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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/free-level-7-exploit-roblox-game-hack PDF link annotation
    • http://aviaprofsoyuz.info/images/free-robux-no-hacks-or-inspect_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-anime-characters-free_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-on-ipad-or-phone_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/youtube-roblox-broken-bones-cheat_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-unauthorized-paymen_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/learn-lua-roblox-free_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/774-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/5-games-that-will-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://direct-link.netIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E64 26560 bytes
SHA-256: 5e962e20ebb90bfab7e5c2bae2ae5cb4c45cee446b35ec34aabb936a46c04bd4
font_01_sfnt_off00008c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C68 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00009609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9609 18520 bytes
SHA-256: 27b62d482810e160b1574f51df10304542400ec922e6d61add6698e6c18aaea4

Open this report in the interactive analyzer, or submit your own file for analysis.