Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5844a9d0e1923b…

MALICIOUS

PDF

43.2 KB Created: 2021-04-29 01:17:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 219065fd5caa815d647ff1aad7fe5b13 SHA-1: ce2f183dc396a6f5470730ad97f180bce3190570 SHA-256: 4f5844a9d0e1923bbdae6dc94a4b470044dc83442eb11592740477c0fde42657
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics suggest a lure for 'free Robux' or game hacks, a common social engineering tactic. The embedded URLs likely lead to further malicious content or phishing pages, and the ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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-do-u-get-free-robux-in-roblox-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/com-roblox-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-everything-free-in-roblox-catalog.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-sensors-entry-point-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-toy-codes-2021-not-used.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-codes-2021-working.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-aimbot-hack-for-nerf-fps.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/codes-to-get-iooo-robux-no-hacks.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-wall-hacks-2021-script.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-robux-simulator.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-websites-for-roblox.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004135.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4135 24384 bytes
SHA-256: e5c43ac1c0910f9dd48580964e74ab398922ea7a7c335a5147ee726cffe7db69
font_01_sfnt_off000078ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78EE 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8595 18712 bytes
SHA-256: 9b233f212a6ddd90491f653b7d63c51497c3ee9c650774aa7265613b69165737

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