Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5bd70cf1f7b611…

MALICIOUS

PDF

34.9 KB Created: 2021-06-20 16:05:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4ac62084bf78510086e3dc2b4770d64e SHA-1: f65ba106d4cf8281d5a3ebb03952afddb1192f02 SHA-256: 6f5bd70cf1f7b611367dfb06c1cea0161438287aaced384e0e6ef1b16ff14701
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, directing users to a malicious redirector. The redirector, in turn, serves further malicious PDF files, indicating a multi-stage download and redirection scheme. The ML classifier strongly flagged this sample, and the presence of multiple links to known malicious infrastructure confirms a high likelihood of malicious intent.

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/show-me-how-to-get-free-robux-on-roblox-game-hack In PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-admin-hack-android_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/2021-free-robux-today-hack-created-by-robuxian_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-unlimited-robux_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_off000030c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C0 22252 bytes
SHA-256: 4ad991c55d022fb54378c3595f7adad27f85bf25540d4865e1b32078a2a2d9f9
font_01_sfnt_off00006267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6267 19420 bytes
SHA-256: 7d77ef90c42c984f33f0cd4d10b67e2f97576dda3a2d6db4b0f4bc55830bac65

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