Malicious PDF — malware analysis report

Static analysis result for SHA-256 f582cc75de850575…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 12:21:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 07caa40d18848e95686f3c12dd0ba38e SHA-1: 3bec1b4a970fd4af2fdae370e4c42a4a7e59b382 SHA-256: f582cc75de850575fa9da8586c7bb5ca0540519d668a29085b9771ea180b190c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are hosted on what appears to be a link farm. The document body and extracted URLs suggest a lure for free in-game currency or game hacks, indicative of a phishing or scam operation. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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/free-coins-on-coin-master-game-hack
    • http://libsmpn1balongpo.sch.id/repository/roblox-account-crcker-free-v3million_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-download-minecraft-for-free-ios_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-spin-link-today-free_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-no-survey_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/fb-coin-master_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/oprewards-com-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/roblox-free-dominus-promo-code-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-games-like-minecraft_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/pro-free-spins-coin-master_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-link-download_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-minecraft-java-free_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-2021-apk_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-roblox-groups-with-funds_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id/repository/brand-new-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/minecraft-java-hacks_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-and-coins_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/best-free-minecraft-server-hosting-reddit_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031cd.bin
0e753979e92ba3720ac9d678f7bb036ca10eb9f510a4303cabd0802ebc752b08		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31CD 23024 bytes
font_01_sfnt_off000065a7.bin
5a33b6bec0c3c7706623313049573f1ed29e81c6598642f68d7630bc30e8a689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A7 17996 bytes

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