Malicious PDF — malware analysis report

Static analysis result for SHA-256 5810f240c198fb24…

MALICIOUS

PDF

35.2 KB Created: 2021-07-08 17:12:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d6a00dda072332a30f2fae640abac594 SHA-1: 0446fefd3a03366040a5f0cda053bafa212646e6 SHA-256: 5810f240c198fb245670c5aeea4215849edfa1b644fbfac8aa5628f1df13bb21
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links, presented as a link farm, that direct users to websites promising game hacks. The ML classifier and PDF heuristics strongly indicate malicious intent, likely to redirect users to phishing or malware download sites. Although no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings suggest a potential for exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/406889139/gamesofficenet-hack-coin-master-game-hack
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-iphone_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/coin-master-card-collection-hack-2021_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/get-coin-master-spins-free_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/minecraft-beta-free_GM479516143.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/spin-and-coin-link_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/roblox-free-game-play-online_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-sample-roblox-download_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/minecraft-reach-hack_GM479516143.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-roblox-printables_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/robloxbux-us-generator_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/robux-free-c_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-robux-by-watching-ads_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/robux-generator-no-human-verification-or-survey_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/minecraft-free-apk-java-edition_GM479516143.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/coin-master-ios-hack_GM406889139.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-robux-no-verification-required_GM431946152.pdf
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-coins-coin-master-link-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000331c.bin
39d76e01cb17be8622a74acd7c371d099459d5da17c4c567dbc33d8ffe6d2dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x331C 23100 bytes
font_01_sfnt_off00006717.bin
818d165fc4df5bed29684778c9de9785090096a7435674cb43da4223c2e2e8d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6717 18264 bytes

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