Malicious PDF — malware analysis report

Static analysis result for SHA-256 14fef51b2728f1e4…

MALICIOUS

PDF

32.9 KB Created: 2021-07-20 15:12:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b7e22b77b5e0eb13ab6da47ed675d15b SHA-1: d62383336c3dff079dabf56f6503f439537c1b4a SHA-256: 14fef51b2728f1e4f74cc277b4632caaa56ea447e48257672b1c258ec7649bf1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/how-to-download-minecraft-for-free-on-pc-game-hack. This redirector is presented as a lure for game hacks, suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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/how-to-download-minecraft-for-free-on-pc-game-hack In PDF document text
    • https://opac.heritagejkt.org/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-spins-on-coin-master-2021_GM406889139.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_off00002c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C46 22476 bytes
SHA-256: b14a6dbd47fbf726e9f780b64e79d4fc53f8acd3cf8a4f9a85ec352628bc0abf
font_01_sfnt_off00005e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E15 18444 bytes
SHA-256: 9e3148d8479467241e454dad7f95496d0753043299a483a1afd63e9d4426fe5d