Malicious PDF — malware analysis report

Static analysis result for SHA-256 6282d0b53d9e0876…

MALICIOUS

PDF

43.5 KB Created: 2021-05-15 22:33:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d8c666f8f537be9edc800d957fe7bedf SHA-1: 55185c9102e99b41e163a168de653ee4efbbd026 SHA-256: 6282d0b53d9e0876162c4e3afd630bc7610fabff4652dc5dac95c72fadfba830
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting "free Robux" and "game hacks". The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious redirector links and the lure text indicate an attempt to lead the user to a potentially harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-co-game-hack In PDF document text
    • https://www.devries-group.de/images/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/free-robux-link_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/roblox-promo-code-to-get-free-robux_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/hack-coin-master-android-game_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_off00004a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A06 26956 bytes
SHA-256: 2a83a5587ad87b2cbc2c41076890ff0df0c72d93055e35d2d8e02c900d26c4c5
font_01_sfnt_off000088c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C2 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

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