Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e7ec95d847d4d5…

MALICIOUS

PDF

35.4 KB Created: 2021-06-22 04:11:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 19475e46ddb366d1baf78e3ca442bd43 SHA-1: 3c51d4566f9878db5ea6a6ad27840bdeb34df481 SHA-256: 97e7ec95d847d4d57351dc9ec29294cf12893ead1b0598c841d2705f3c9afeac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/buy-robux-for-free-games-game-hack. The document body and heuristics indicate a lure for game-related cheats or currency, likely to trick users into downloading further malware or engaging in phishing. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/buy-robux-for-free-games-game-hack In PDF document text
    • https://www.devries-group.de/images/how-to-use-cheat-engine-64-roblox_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-robux-come_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/roblox-account-taker_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/roblox-shirt-free-copy_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/wwwroblox-hack-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/how-to-hack-someones-roblox-account_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3351 22396 bytes
SHA-256: a7dbe1df37a474c707a85ab125fa3583bb25fdcd0674685d86424450b7f4a999
font_01_sfnt_off0000653e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653E 19156 bytes
SHA-256: 3e829d21fab2fac9cdd789ad76dff7ad0ea72ae68ea4ac6ef74d817bd076ef31

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