Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e27049b8a73ff7…

MALICIOUS

PDF

33.5 KB Created: 2021-06-26 07:42:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0a394e96eff67be58ca95923a4b20b4d SHA-1: a99698056364e324d8bc82c5d8f05465182bf6ac SHA-256: 09e27049b8a73ff78be44f8baa07cf0f91e3e9edc572b70b260f7007804dc11c
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 0.9824

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 http://netcdn.co/app/431946152/robux-hack-no-human-application-game-hack PDF link annotation
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/how-to-get-free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/how-to-get-a-free-dominus-hat-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/roblox-hack-how-to-make-a-wall-say-something_GM431946152.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/free-minecraft-wallpaper_GM479516143.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_off00002d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3E 21864 bytes
SHA-256: 3d06d67c16bed935fa69d6988625a1e05046c26ee6661c1f1f5506ab0863d3c9
font_01_sfnt_off00005d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2B 19456 bytes
SHA-256: 130bfd055a782ad2b6430ff37393d7bc77f5993e2a55e95e489b00cd3fcb2210

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