Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9869573b0a3a20…

MALICIOUS

PDF

36.4 KB Created: 2021-07-02 08:43:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d97c2b7112269cb2d34db98a7a95d7c2 SHA-1: e5d94c49fb371e901748a5bc59cebde8c9cd7210 SHA-256: 0f9869573b0a3a20e0cc292552adf852ff4a19c8203bd6893cfa96406893d6f1
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs indicate a lure for free in-game currency (Robux, Coin Master spins), which is a common social engineering tactic to redirect users to malicious sites or download further payloads.

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.co/app/431946152/how-do-you-get-free-robux-website-game-hack
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-november-2021_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-free-spins-activegamer_GM406889139.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-computer_GM479516143.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/minecraft-beta-free_GM479516143.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robloxs-makeup_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/minecraft-gun-mod-download-free_GM479516143.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/minecraft-hax-download-no-virus_GM479516143.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/gamnes-that-give-free-robux-without-pass_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-roblox-glasses_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/robuxmatchcom-free-robux_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robux-generator-roblox-2021_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-free-robux_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-generator_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/cheat-kart-roblox_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/descargar-hacks-para-jailbreak-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000332b.bin
f20d02082c4b989ca5c2490ba108695529d8b323c9e4c5e332edfab0b58a047d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x332B 23288 bytes
font_01_sfnt_off0000679f.bin
3b0b0ce89cfa69da53a10b76a757cdb1863cc845ffbf21512fdd93e9beccccd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x679F 19632 bytes

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