Malicious PDF — malware analysis report

Static analysis result for SHA-256 165131966ba8c260…

MALICIOUS

PDF

32.3 KB Created: 2021-07-19 17:11:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3a44aaf62af6536e3e5a745526bd89c3 SHA-1: bdb8a4f8041aa8a96f853da5575442c9b8dcf1a5 SHA-256: 165131966ba8c2604083b35926c75df9f706601e462853eb083624393008a6c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary lure, 'http://netcdn.tw/app/479516143/minecraft-realms-free-trial-game-hack', is identified as a known malicious redirector. The document body also contains a call-to-action phrase, reinforcing the deceptive nature of the content.

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/minecraft-realms-free-trial-game-hack In PDF document text
    • https://fotoclub3b.it/images/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://fotoclub3b.it/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://fotoclub3b.it/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://fotoclub3b.it/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fotoclub3b.it/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fotoclub3b.it/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://fotoclub3b.it/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://fotoclub3b.it/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://fotoclub3b.it/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://fotoclub3b.it/images/how-to-get-free-spins-on-coin-master_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_off00002ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE2 22092 bytes
SHA-256: 4539efca9c84415f8032b9afab34eb19f25a6828a0ea2ae4bd1cb74be5d78f44
font_01_sfnt_off00005dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBF 17900 bytes
SHA-256: 5e9e7e4dd5050dedb25c4bef302629088f41d3cb5f82066cb4e6c0f6a9bca7dc