Malicious PDF — malware analysis report

Static analysis result for SHA-256 3578a5ca5bc4188f…

MALICIOUS

PDF

34.7 KB Created: 2021-06-19 11:09:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9437cb8f78890d630b82b87d428af045 SHA-1: 165425d49d04f00b2301bf6e7fa276479d9a7492 SHA-256: 3578a5ca5bc4188f1da9ac4efa26d01c19b33c02526ac1cf879c558cdc414539
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are SEO-optimized to appear as legitimate download or hack pages for popular games. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests a phishing or malware distribution attempt. While no scripts were directly extracted, the document's structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful content.

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/get-free-robux-without-human-verification-2021-game-hack PDF link annotation
    • http://ipdrs.org/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/how-long-shold-the-account-stealing-hack-on-roblox-last_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-shirt-roblox-template_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-hack-to-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/tiktok-free-unlimited-likes_GM835599320.pdfIn PDF document text
    • http://ipdrs.org/images/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-roblox-ad-banner-for-shurts_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-gold-cards-link-2021ee-spins_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_off00003021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3021 21824 bytes
SHA-256: a8d9ddd96305a09a127fdbc1e14aefd698769e38d16ac94e5b4e0f2db4eb664f
font_01_sfnt_off00006026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6026 19916 bytes
SHA-256: d964f7b849ae3de11f2cdeb74b946ef1e4e41aa55134d73262cf3c10a67934f8

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