Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5240e5068c43ac…

MALICIOUS

PDF

35.1 KB Created: 2021-06-26 18:06:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 06a4b31f11d7a072f78bbbb0725956b6 SHA-1: 61efed51c5bc208b9d7dddbd789ba04ece2b7b09 SHA-256: 4e5240e5068c43ac312f22f449e169c9ad95467b437b8288c9643ff71e8bab59
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, forming a link farm, and is flagged by a machine learning classifier as malicious. The document body, though partially corrupted, suggests a lure related to game cheats and hacks, indicating a phishing or malware distribution attempt. The presence of multiple URLs pointing to potentially harmful content supports a high confidence assessment.

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-to-hack-roblox-ninja-legends-game-hack PDF link annotation
    • http://www.ocic.hr/files/free-roblox-exploits-that-supports-loadstrings_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/gift-card-codes-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-free-roblox-items-2021-febuary_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-free-roebucks-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-do-you-get-free-vip-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/roblox-hacking-apps-download-pc_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/earn-robux-now_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-robux-gift-card-generator_GM431946152.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_off000030db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DB 22620 bytes
SHA-256: ffb2860dc28359984947efea6b895f80f6df787308c382ba55f5a6d055880172
font_01_sfnt_off0000635a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635A 19304 bytes
SHA-256: 36015e419a2a60abc93f056edaac39d5f178eaf1a1ef92c225a985bd455a8850

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