Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b604e4dbd8ed847…

MALICIOUS

PDF

47.6 KB Created: 2021-05-15 06:39:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 66becffa529b386ffd22475d5c09471f SHA-1: 5050169e085e6d749e4f86b9f17b7677c9833d8f SHA-256: 6b604e4dbd8ed847ca70351a07835822b3d42ec908ff60cc4b4aec092d53f338
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on them, masquerading as 'free Robux' or game hacks. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-without-verification-2021-game-hack In PDF document text
    • http://e-onlinearchiv.de/images/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/robux-link_GM431946152.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://e-onlinearchiv.de/images/free-robux-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_off00004b4a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4A 26864 bytes
SHA-256: f3c6f51b874640f0a9895dc4d53754ab9b0927c0d4ab692572d5971b566ec5ae
font_01_sfnt_off000087b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B4 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000945c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x945C 19368 bytes
SHA-256: a82984a519d7edf94c6531cfcf7f8df3cbe602e214b877051ae5dee029c294bf

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