Malicious PDF — malware analysis report

Static analysis result for SHA-256 87183912796fdfdc…

MALICIOUS

PDF

33.0 KB Created: 2021-07-19 23:49:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: adfc6277e772253b6ea5e60b0ef84471 SHA-1: be4c8822e6fd6f1bc322ac87f96c32291abd09ec SHA-256: 87183912796fdfdca2cd5ac41e710607b3e303b26bd13dfd6a90223f94afbbc1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body explicitly mentions "Free Minecraft Codes" and "CLICK HERE TO ACCESS MINECRAFT GENERATOR", reinforcing the lure. The presence of multiple redirector links and the ML classifier's high confidence indicate a strong likelihood of malicious intent, likely to download further malware or lead to phishing pages.

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/free-minecraft-codes-game-hack In PDF document text
    • http://www.dcgsrl.it/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.dcgsrl.it/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/minecraft-mac-free_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
stream_002_off000029fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29FC 23876 bytes
SHA-256: 8ddd14009b17ce9f77e0fef2905f692fba3c6bf888cbcac3fa8244b748710dd6
font_01_sfnt_off00006025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6025 17884 bytes
SHA-256: ca0982e5699fcbbad1c272e9f6df792bd17b0fef580afa6f1747d77cedc77eee