Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e396dc209e8b4a…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 05:08:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7de22e65ca6b482df5de0c7ec4d03551 SHA-1: 716b7c4ed7c600550f10321a6bffe7cff35f7e09 SHA-256: c1e396dc209e8b4ade74bc7cf61c28273a79298f002eeb071bbb3259b0989b9b
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/getrobux-come-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-become-a-hacker-in-roblox-easy_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pubg-uc-nepal_GM1330123889.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-fling-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-page-no-human-verifaction-no-surves-no-email_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-how-to-play-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-free-robux-items-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/flip-master-free-coins_GM406889139.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_off00002fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB7 22120 bytes
SHA-256: 895d28561364ddc6e7cd46da308ee3150f95311c62f2db0643aa6416af13769a
font_01_sfnt_off000060e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E4 18916 bytes
SHA-256: f81d68fe278d8ac86eb0b8e96636390d19113ae7fbe58b33a1d644febb5584d3

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