Malicious PDF — malware analysis report

Static analysis result for SHA-256 f530ae967ea0f0af…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 04:30:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: eb9e1c5a254650628b12858e2ec4877d SHA-1: 6bd6fee918328d3bbee66c36016c3d3dfa736088 SHA-256: f530ae967ea0f0af62a4a934d478c8ce3c0ef73f6dfb60640765fba79dc97fd3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are identified as malicious redirectors, specifically targeting users interested in game hacks and cheats. The document body and heuristics indicate a lure for free game items, directing users to URLs like http://netcdn.tw/app/479516143/free-minecraft-alt-generator-game-hack, which likely serves as a gateway to further malicious content or downloads. No scripts were extracted, but the presence of malicious links and the lure pattern 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.tw/app/479516143/free-minecraft-alt-generator-game-hack In PDF document text
    • http://sellitafrica.com/media/storage/editor/files/world-zero-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/did-someone-hack-john-doe-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/claim-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-make-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/robux-hack-on-aindroid_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/developer-console-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/hacks-roblox-transform_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/codes-for-free-sp-in-ice-cream-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3295 22176 bytes
SHA-256: 8419c7f1321c40ebbe34e69a310d9afbf4454cbe7dced0756e81b656be098d9c
font_01_sfnt_off000063df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DF 18072 bytes
SHA-256: c8f7285ff86763399e2a5ac55585dfb2fc2dace9f282f455ab031e88ea571d9c

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