Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e18e917d47e2a6…

MALICIOUS

PDF

43.8 KB Created: 2021-05-19 13:38:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 92e480b9ec23bb2a72f0eae549d4f206 SHA-1: bf3ab41186b2855541b5a95e0af7857b86bb4ed5 SHA-256: a2e18e917d47e2a6b4f27b5a1b10d06483abfd2476e9ab27a4a8fd86af4a90b1
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to websites offering free game currency or hacks, a common phishing tactic. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO manipulation to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/show-me-how-to-get-free-robux-game-hack PDF link annotation
    • http://unionmusicaldebenidorm.com/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/hack-coin-master-343-apk_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
stream_003_off00004917.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4917 27188 bytes
SHA-256: 6f01248aab2719f7a231e9b0d53cd4ea1b17cef82bcdeabd028960a1ed96d3fd
font_01_sfnt_off00008823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8823 18644 bytes
SHA-256: e51f5be8af2709164d8b68ea121f2f3a624582c0bbe9bba0986852bbf2bf647d

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