Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dfb504ac9480137…

MALICIOUS

PDF

34.6 KB Created: 2021-06-27 23:28:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ab9229eab4f268dd5c87dc75f14e57cc SHA-1: 0ffae32d1af26d216657b226fa6d80eb8f30cdf6 SHA-256: 3dfb504ac9480137488ec58f47fa0f6ea532910c91ba6a7f808f349482a0212d
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are presented as links to game cheats or hacks, suggesting a lure for users to download further content. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" heuristic further supports a malicious intent. The document's structure and content indicate it is likely part of a phishing or malware distribution campaign.

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/cheats-for-jailbreak-on-roblox-game-hack PDF link annotation
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-gameplay_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_off00002f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F88 22524 bytes
SHA-256: cb3b6c5fe12df1a50ba4e69000d847fca7a11e7b9ca51982b83d01f4af7f4f6a
font_01_sfnt_off00006142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 19376 bytes
SHA-256: 3298ed5d0a215e30ed053ac0dd50f2b401596f4913c7f93974a8c0af6ef990cd

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