Malicious PDF — malware analysis report

Static analysis result for SHA-256 200eb745abc5b4b4…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 19:59:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0760adbbfd4b3636f8508398beefbd6a SHA-1: 54fab409c9504e5aac07eda267aae71e1c6a1183 SHA-256: 200eb745abc5b4b4ea44b697c9f06726955157e9ba4bfc42b76e45d8ed83f4e7
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 0.9980

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.tw/app/431946152/how-to-hack-to-get-robux-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/god-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-codes-no-generator_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-test-or-dowmload_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/avatar-roblox-game_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_off00002dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCB 22004 bytes
SHA-256: 2b97a22acdba679621ca35eb48875033b226b6c7cb26d6b084ceb997f3363ff2
font_01_sfnt_off00005e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E95 18992 bytes
SHA-256: 689b3580a88e4ac2b5c71224fd8e7c25284750e13a7ef80e9d6f951111b623c5

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