Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a02ffe53b8f2957…

MALICIOUS

PDF

33.3 KB Created: 2021-07-19 17:05:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f3ea35cf58e228a86b3bcbc03b3812e0 SHA-1: c6acc72bfc5f67fc95885799d26922744afd1801 SHA-256: 1a02ffe53b8f2957412b796d545682859e9bd968297ee2ce82b57fc150629540
160 Risk Score

Malware Insights

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

This PDF document employs a lure of 'game hacks' and 'generators' to entice users into clicking embedded links. These links redirect to malicious infrastructure, which in turn serves further malicious PDF files. The primary malicious URL identified is http://netcdn.tw/app/479516143/classic-minecraft-net-hacks-game-hack, which is part of a chain leading to other suspicious domains. The document's structure and embedded links strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/classic-minecraft-net-hacks-game-hack In PDF document text
    • http://www.eaapiaria.es/images/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • http://www.eaapiaria.es/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.eaapiaria.es/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://www.eaapiaria.es/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://www.eaapiaria.es/images/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://www.eaapiaria.es/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/free-100-robux_GM431946152.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_off00002f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2E 22664 bytes
SHA-256: 6303480a77e2190ee6866bed364d3719c2ef5c23c96b4542f2dccbc02c99ac43
font_01_sfnt_off000061cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CD 17812 bytes
SHA-256: 06eb0692cb0ff670c8084f221f19fc536b6b0c4a84b00058b05a05adc7fae17c