Malicious PDF — malware analysis report

Static analysis result for SHA-256 291b29058fb22179…

MALICIOUS

PDF

37.1 KB Created: 2021-05-21 01:28:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1cb4a7541847201c501e2e57bbad3ec7 SHA-1: b9b704c2696ed3f462ee5cdf943d47a866f2a722 SHA-256: 291b29058fb22179f674b20847634b1295dda7817d6d21eac261dd6f40a9ed17
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically disguised as game hacks or generators. The document body and embedded URLs strongly suggest a lure to download potentially unwanted or malicious software. 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/can-i-download-minecraft-for-free-game-hack In PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-tiktok-fans-without-verification_GM835599320.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/pokemon-go-free-kanto_GM1094591345.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_off0000345f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x345F 26044 bytes
SHA-256: b0bdd381453fd48523a7b9e2cefabae306d10f678b9a849e39491b535c91e3e2
font_01_sfnt_off00006fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB6 18292 bytes
SHA-256: 0c6b6f70db09f0b4db7fba2a2884c5f52224e4e70f7f4d7105e223bf7e2289b2

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