Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae557890462d9e55…

MALICIOUS

PDF

43.3 KB Created: 2021-05-17 01:02:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7d35c5d0d0d32be4b5636b5f2f9a5952 SHA-1: 51abe774dd1ba0b0e62be88b683a2e3b2cc7c5d0 SHA-256: ae557890462d9e5566914a210d902dd9588a17c34779b379df4e6ccf2dfa3818
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures for popular games. The document body and embedded links point to infrastructure designed to trick users into visiting malicious sites. The ML classifier also flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/coin-master-coins-free-game-hack In PDF document text
    • http://www.drent.se/images/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/how-to-hack-roblox-2021_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000471b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x471B 24356 bytes
SHA-256: 730befab42dbb8187e9e6d14b4479c28ce293bfe655fd31a5b3ff91edaa96f35
font_01_sfnt_off00007e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7C 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8867 17712 bytes
SHA-256: 0afd6f2792edb83b7f2a0201a1e0a5eb12ca81ad868fb3e42742340ee6e5fb0e

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