Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a6fc1118e10cb4…

MALICIOUS

PDF

36.7 KB Created: 2021-05-21 17:14:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e254a7b91491d3f123d47ab6bb2195e7 SHA-1: 4bb7bdaf671caba88fe824bf2dee408356d5b212 SHA-256: 93a6fc1118e10cb43500da23a2dad598b0b1683f9047be8c802fcbb43fbe2869
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links and a call-to-action button designed to lure users into clicking on a URL that redirects to a malicious website. The document body and heuristics indicate a scam related to free game items, likely intended to lead to further compromise or malware download. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/479516143/good-free-minecraft-server-hosting-game-hack In PDF document text
    • http://kingmusic.pl/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-fan-page-free-spins_GM406889139.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
stream_002_off0000351e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x351E 25164 bytes
SHA-256: 711e09731e67d7f5f1e3c16814c2a4c4c01842ffa6529cddeae09da158fab557
font_01_sfnt_off00006e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 18284 bytes
SHA-256: 7289302ae6250539789b9217bcc68894f0328a970bf5d67cc3f1b282cc8d95f9

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