Malicious PDF — malware analysis report

Static analysis result for SHA-256 2623169373a5e145…

MALICIOUS

PDF

52.6 KB Created: 2021-06-09 08:04:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1e312f2ae00f8943a9d15ba9927d4119 SHA-1: 3f3479e1ce10d7f379957449a1cac867549cea52 SHA-256: 2623169373a5e145ae720f7e668fe89bfb8cdc3b34fb1bd5c1f5f774e856afad
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a primary external URI, indicating a link farm or SEO spamming operation. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of many external links suggests the document's purpose is to redirect users to potentially harmful sites, possibly for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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 https://netcdn.tw/app/431946152/one-player-game-free-roblox-game-hack PDF link annotation
    • http://simon-skov-fougt.dk/billeder/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/jaibreak-hack-roblox-script-auto-aresst_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/pokemon-go-free-daily-remote-pass_GM1094591345.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005264.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5264 28132 bytes
SHA-256: 6013646b9c9d73609af32903bf21127ce3c7696ab2b0248932379b72fb4df22a
font_01_sfnt_off000092c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C7 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off00009c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C84 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA996 18768 bytes
SHA-256: 5e86d565ef20e2f66584154714c9704d640a3a56bab1497e0477e3922a56a733

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