Malicious PDF — malware analysis report

Static analysis result for SHA-256 2813b9f2a69e21b2…

MALICIOUS

PDF

32.7 KB Created: 2021-07-19 16:52:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1277cfda2466c6978f8d15c2df5b39e0 SHA-1: 39b4421c415f695eea3652bce00dac815e061818 SHA-256: 2813b9f2a69e21b258fad65f706373141d910071e838fd15e6bd4b698fa1209c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as offers for game hacks and redeem codes. The document body and heuristics indicate a lure for users to click these links, which likely leads to further malicious content or downloads. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/minecraft-redeem-code-free-game-hack In PDF document text
    • http://ivalor.fr/images/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • http://ivalor.fr/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ivalor.fr/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://ivalor.fr/images/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://ivalor.fr/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://ivalor.fr/images/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://ivalor.fr/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ivalor.fr/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://ivalor.fr/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://ivalor.fr/images/minecraft-free-no-download_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_off00002aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA7 23060 bytes
SHA-256: 16d73abc487fb117e95fc32d9644fc9d6aa58dd90e29affbe9e3382599b52e42
font_01_sfnt_off00005e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E64 18144 bytes
SHA-256: cc19f71067fb84b21b4f81fd44d646587f5653a8a3073e37b17122851b8ee9dd

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