Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b175db77afef580…

MALICIOUS

PDF

34.1 KB Created: 2021-06-28 08:03:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 77f545ab6196bbb64b675866395fced4 SHA-1: a7a29fc2e4e835e230b3a1368ea287d098a354e6 SHA-256: 7b175db77afef58023d20d9f57a592b8b4cf0800468245a28c9f35c8b2d89cb7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious SEO link farm, containing numerous links to external PDF files, many of which are related to game hacks and cheats. The primary URL http://netcdn.co/app/431946152/free-hair-extensions-roblox-game-hack suggests a direct download or landing page for potentially unwanted or malicious software. 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.co/app/431946152/free-hair-extensions-roblox-game-hack PDF link annotation
    • https://happypipers.ch/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://happypipers.ch/images/mcpe-hacks_GM479516143.pdfIn PDF document text
    • https://happypipers.ch/images/como-tener-mucho-dinero-en-jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://happypipers.ch/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://happypipers.ch/images/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://happypipers.ch/images/roblox-hack-como-tener-robux-gratis_GM431946152.pdfIn PDF document text
    • https://happypipers.ch/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://happypipers.ch/images/project-zero-roblox-free_GM431946152.pdfIn PDF document text
    • https://happypipers.ch/images/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • https://happypipers.ch/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://happypipers.ch/images/roblox-someone-thinks-im-hacking_GM431946152.pdfIn PDF document text
    • https://happypipers.ch/images/websites-that-give-u-free-robux_GM431946152.pdfIn PDF document text
    • https://happypipers.ch/images/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • https://happypipers.ch/images/robux-hack-2021-ios_GM431946152.pdfIn PDF document text
    • https://happypipers.ch/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://happypipers.ch/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://happypipers.ch/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://happypipers.ch/images/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • https://happypipers.ch/images/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://happypipers.ch/images/free-coin-master-spins-no-verification_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_off00002fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBB 22096 bytes
SHA-256: 73cff71c8d127d4a741561aa728748a8dde87ee8baaad672368755b094ba76f3
font_01_sfnt_off000060c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C5 18876 bytes
SHA-256: fb725094b2906fb84b4aded2a701d6b470c795c10bbd1432c07b1f81e130ae74

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