Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d92eb507f42e5b…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 03:56:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bde228dcb89a984a86ca52739e28a169 SHA-1: 53547e087265c3c015b9571e61cbf9b236834c92 SHA-256: 96d92eb507f42e5b88f7e8413a27ed0121be23b2c190638b959ecedda35c3239
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/oprewards-com-earn-game-hack PDF link annotation
    • http://library.umuslim.ac.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-into-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-giveaway-everyone-will-get-robux-proof_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-clothes-mobile_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-studio-apk-free-download_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-app-cheat-to-fly_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/como-ser-hacker-en-roblox-en-grand-blox-auto_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-link-today-facebook_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_off0000325d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325D 22484 bytes
SHA-256: 15f0f35edfab11fbe35d4607f2c71f79399d10157712ad1aef6531b2c43c1209
font_01_sfnt_off00006486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6486 18820 bytes
SHA-256: 98371626da931bbeb902ee9c6a395854158c625b387237cb0e05488af2fd1844

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