Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0d96bf2238f0cb…

MALICIOUS

PDF

33.6 KB Created: 2021-07-19 14:24:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c71148fea338f380d6850ad9f7a39600 SHA-1: f649d02cd46b362bd5303c08b7673b7071fba005 SHA-256: 3f0d96bf2238f0cb8c24c63445e1bf96c4d74e6a671b0ae9283c036687feeed5
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting free game hacks and generators. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links reinforces this assessment. The document's content and links suggest a phishing or scam attempt designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/how-to-get-minecraft-dungeons-for-free-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-minecraft-pe-for-free_GM479516143.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_off00002ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC7 22520 bytes
SHA-256: 61c20e0f24df026b7e267be24ae5a6b8ede39f808ee476a76f8133a2caa70d89
font_01_sfnt_off000060f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F5 18472 bytes
SHA-256: 65ee82f26cafa7906902f4dbf8f4098f0781a130d3f16ad2d63d9ccc83542dd0

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