Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e59f15cd0d4fb4…

MALICIOUS

PDF

33.3 KB Created: 2021-07-02 04:56:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e2bf4efe21631192d7aab5bbf48592a2 SHA-1: 681cc23b03f7f186fd614f578c417478d02993c8 SHA-256: 02e59f15cd0d4fb41f07043dff41ecbb4a36b265e0cb262c8c79fe8fc2c682a1
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/roblox-cheating-story-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-coins-generator-roblox-high-school-2_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-other-people-roblox-accoubt_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/cheats-for-roblox-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/youtube-the-coolunique-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/rblx-pro-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hax_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/youtube-how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/unpatched-cheat-engine-roblox-2021-february_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-legit-no-groups_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-coins-and-spins-in-coin-master_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_off00002a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4C 22964 bytes
SHA-256: 1c28853b0cefc4ee404706aec22d540e5f843f629ce1968639d829086e217d44
font_01_sfnt_off00005d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5F 19056 bytes
SHA-256: 542092f29d335ae3215be0e4e0811fbbcfb5aae0aad59515df1beaf3f9b3d373

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