Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc016551845ca198…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 15:32:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7d5186e7231fddc02865c774aa9163b7 SHA-1: d1a0f17e5a2dc0871d461127f448451618666db8 SHA-256: fc016551845ca198c923f812328b45778a0945221da5223884544a958eb27734
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are disguised as SEO-friendly links to game-related content. The document body explicitly mentions 'how-to-change-your-username-on-roblox-for-free' and includes URLs pointing to 'hack-game-roblox-apk' and other game cheats, suggesting a lure for users seeking free in-game items or hacks. The presence of a 'Download Now' button heuristic further supports the malicious intent of directing users to download potentially harmful files.

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.tw/app/431946152/how-to-change-your-username-on-roblox-for-free-game-hack PDF link annotation
    • http://www.siahotel.com/userfiles/files/hack-game-roblox-apk_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/free-roblox-unpatchable-script-execiter_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/how-to-hack-the-powerplant-inside-roblox_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/how-to-hack-on-roblox-jailbreak-into-police_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC7 22196 bytes
SHA-256: eb9ad1bdcc8dfbb2659d04fa81d8411eb328d0f36a0befe83ef8a42754d05c92
font_01_sfnt_off000060e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E3 19540 bytes
SHA-256: 13561b44f61144c121be84d59be9fad9902bdfea6fe0fd721d4b8ce19c369a19

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