Malicious PDF — malware analysis report

Static analysis result for SHA-256 421c4f18f7f72f5f…

MALICIOUS

PDF

39.3 KB Created: 2021-05-21 15:46:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 05fa85f3f0a6acc2a5b272781c9f8fed SHA-1: 3f7e4b742cf7a41ea7fbf83bf6033cccc1b15d37 SHA-256: 421c4f18f7f72f5fee220865cc415c4ddb473f94e205f05cdcc0572937e40164
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The document body explicitly contains phrases like 'Free Robux Not Fake' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the social engineering aspect. The embedded URLs likely lead to further stages of infection or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8068

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/free-robux-not-fake-game-hack In PDF document text
    • http://jdlogistic.cz/images/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://jdlogistic.cz/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://jdlogistic.cz/images/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://jdlogistic.cz/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://jdlogistic.cz/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F92 25712 bytes
SHA-256: 7296fbd024dd4c27aad7334f64c952b840d2ed4c03cc02406461b5af04e4f544
font_01_sfnt_off00006ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB7 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000775f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775F 18516 bytes
SHA-256: ca79d80576681ece98af22104654f282f19bfdcccdd95bbb76316d29f9029162

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