Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dccc257e23d8b63…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 08:45:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fd61817e075c88e560f13be6cbf35519 SHA-1: 42ff599f14764189e65760d8891ce2dc92042404 SHA-256: 2dccc257e23d8b63abbb39f295c2d4419a1c1ed96917055862ec83cb70c1c226
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to websites offering game hacks and free in-game currency, such as Robux and Coin Master spins. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the document body text strongly suggest a social engineering tactic to trick users into visiting these sites. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/you-promised-my-son-free-robux-game-hack PDF link annotation
    • http://www.travelone.ae/userfiles/files/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-hacks-for-windows-7_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-no-siging-i-n_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-daily-free-spin-and-coin_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_off00002f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7D 22504 bytes
SHA-256: 3903ea0b1fcb11f9768529b722c4f2e12a7dac3b441c3f2a499d6c60baa3453c
font_01_sfnt_off000061a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A2 19960 bytes
SHA-256: f29a7a7b71d38b505cc7d4cb2f72b745270787244330deb29ff722716c8b7989

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