Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c85914789d6d6d2…

MALICIOUS

PDF

33.8 KB Created: 2021-07-20 22:20:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 25b3eaae9f6858d84d48973ae06ac16b SHA-1: a086802972d9e67a16af505082db1f8e6c9499fc SHA-256: 5c85914789d6d6d2497cd8ec51ddad61b8bc6fb85037101d3ae28650c7dacbb6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that masquerade as game hacks or generators. The primary malicious link, http://netcdn.tw/app/479516143/minecraft-name-tag-hacks-game-hack, is designed to lure users into clicking it. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow, likely intended to lead users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/minecraft-name-tag-hacks-game-hack In PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/how-to-make-a-minecraft-server-for-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
font_00_sfnt_off00002efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFD 23056 bytes
SHA-256: db81741b3996dbffda2d47b09dedbe86ce6f1ed1aa9bdeb54ac91b4f0e42670f
font_01_sfnt_off0000625f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625F 18288 bytes
SHA-256: eb7ed4260d6d64c3cd9f3242d6af3157cea31df7eff6e4be90ec8e6c005c47d1