Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1fca8b6705f82fb…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 01:52:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bb81ca25e7d2b9ae0cb5c6db98c700ae SHA-1: cd751f71731b57a975ec10534213326b9c71e25b SHA-256: d1fca8b6705f82fbfd8401cfa4a785be456323fce6058ac9632b02f0914ab3d7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The ML classifier also flagged the PDF as malicious. The document body and extracted URLs indicate a lure related to obtaining free in-game currency or items for games like Roblox and Coin Master. The presence of a link farm heuristic further supports the 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/glitches-to-get-free-robux-game-hack PDF link annotation
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/hacker-un-jeu-sur-roblox_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/web-free-robux_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/tiktok-followers-free-no-verification_GM835599320.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/free-robux-with-just-a-click_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/real-roblox_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://daring.mtsn1lamsel.com/__statics/gudangsoal/files/apps-for-free-robux_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_off0000319f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319F 22556 bytes
SHA-256: ff093b566e26d261a27a669cae0d25a7015fea4dc060c4b0e85bacb6d8d81bab
font_01_sfnt_off000063f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F8 19180 bytes
SHA-256: 4a79fe2670e288ba8c3a0b8d3ccc80ced8ca294dc351bfae4c093e35ece7fee9

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