Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f4f730de4f2f1f3…

MALICIOUS

PDF

40.7 KB Created: 2021-04-30 01:36:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c6073126844e1d35847c3538523f8ece SHA-1: 252c6d777d078fc3c1bf56a72a51d17f8ae04a6b SHA-256: 1f4f730de4f2f1f30ce73b02da94abe61625b00299f03329a96d11936349f25f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" which redirects to malicious infrastructure. The embedded URL `https://netcdn.xyz/app/431946152/cyber-roblox-hacker-game-hack` is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into downloading further malicious content, likely related to game exploits or cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/431946152/cyber-roblox-hacker-game-hack In PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-restaurant-tycoon-hack-lua-c.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/roblox-background-2021-its-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/what-is-the-secret-code-to-get-free-robux.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-cheat-engine-how-to-give-yourself-a-gear.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/code-for-generate-free-robux.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/free-roblox-clothes-wiki.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/big-paint-ball-roblox-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-stuff-on-roblox-catalog-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-kick-off-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-hack-no-survey-no-download-2021.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000042a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42A8 25436 bytes
SHA-256: 825814926cacc2fc69f0c58e4ac32e55d92900c6978bdaa845b1f2b2471ab304
font_01_sfnt_off00007d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D24 18360 bytes
SHA-256: e76b1060174207314cb0343ea5eb013888a211f4478452135713154e0bc33a9b

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