Malicious PDF — malware analysis report

Static analysis result for SHA-256 511a3de7fc02cd71…

MALICIOUS

PDF

42.8 KB Created: 2021-05-19 00:08:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 732d563f94ab87e08f793ce53efab33b SHA-1: 0efa94e1f549426cbffbdc9f84b4d576160444d1 SHA-256: 511a3de7fc02cd714c37ca92c565ce36ab9bdbca60dc2006ed72a92363f4f3a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a call-to-action phrase, strongly suggesting a social engineering lure. The primary URL points to a 'robux generator' which is a common pretext for distributing malware. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/real-robux-generator-game-hack In PDF document text
    • https://icefuture.ru/images/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • https://icefuture.ru/images/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://icefuture.ru/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://icefuture.ru/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://icefuture.ru/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://icefuture.ru/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://icefuture.ru/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://icefuture.ru/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://icefuture.ru/images/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • https://icefuture.ru/images/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • https://icefuture.ru/images/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://icefuture.ru/images/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://icefuture.ru/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://icefuture.ru/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://icefuture.ru/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://icefuture.ru/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://icefuture.ru/images/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://icefuture.ru/images/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://icefuture.ru/images/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • https://icefuture.ru/images/coin-master-hack-355_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
stream_003_off000049b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B7 25384 bytes
SHA-256: 5a15e2d9c480174bdcaba0060af01eaceb51deb2a638c790d5c026d2d4a053ea
font_01_sfnt_off000084e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E6 18256 bytes
SHA-256: 906ea21e34abb327d49597c14d5b17b7cc18bd5fadfd873c2347cb1d5c8b4ad6

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