Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4727cbc84c80e4…

MALICIOUS

PDF

41.5 KB Created: 2021-04-29 11:50:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ca90d535e989d4056b3d18cbd22ef561 SHA-1: 27b9f093f312bb4fd3b87e461d8c51f7439b9a99 SHA-256: 3c4727cbc84c80e404acbef5b765039ae452f667024d17ccb911b59f86105497
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free in-game currency to entice users. It contains multiple links to redirectors and other PDF files hosted on `technibuild-group.com`, suggesting a campaign to distribute potentially malicious content. The ML classifier strongly flagged this PDF as malicious, reinforcing the observed redirection and lure tactics.

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/how-to-hack-a-roblox-account-2021-easy-game-hack In PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hack-clients-for-roblox-dragon-ball-z-final-stand.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/injustice-oa-roblox-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-robux-for-free-no-hacks-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-cards-tk.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hack-roblox-hydra.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hack-account-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-hack-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-wanted-money-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-skin-creator-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-on-roblox-apocalypse-rising-2021-august.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_off0000417b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x417B 26192 bytes
SHA-256: 57b6df68a7ceb6f9084b39a6dedf61e77c8c104a50f6723c285b322bf192ffb1
font_01_sfnt_off00007d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D80 19172 bytes
SHA-256: be49428cddd750c8a2a34f8d2032b5793a1dd5f774fff34c32dc83a379b4b65a

Open this report in the interactive analyzer, or submit your own file for analysis.