Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ae406afa67600c…

MALICIOUS

PDF

43.0 KB Created: 2021-05-18 05:33:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4080f2ffe5d76c0d31930d4b57e2672e SHA-1: 12f2a34c4fb50c5b5329cf8b0b0a1e8f02ed8633 SHA-256: f1ae406afa67600c44dd3fa9933d45de5a2bde2bbdcd7a9587c7bb01c404af3b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are disguised as PDF files related to game hacks and free in-game items. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a tactic to drive traffic to potentially malicious or ad-filled sites. The presence of a specific lure for 'roblox-avatar-com-game-hack' and other game-related terms points towards a social engineering attempt to trick users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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 https://netcdn.xyz/app/431946152/roblox-avatar-com-game-hack PDF link annotation
    • http://1a-vermietung.com/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://1a-vermietung.com/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/best-free-robux-sites_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
stream_003_off0000499a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499A 26076 bytes
SHA-256: f038c3141c35ad85e16212e6c2b5c05c9777a51bb1ce9d0fb4ad0349f1eaa734
font_01_sfnt_off000084de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DE 18492 bytes
SHA-256: 0bfbb41744fd3891f32c18381ea8358331ecc6352836a5a8663314898f67b625

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