Malicious PDF — malware analysis report

Static analysis result for SHA-256 847a49eee0853206…

MALICIOUS

PDF

41.6 KB Created: 2021-04-30 07:51:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e83b6afeaf529dc4c4665095a0829786 SHA-1: b33973c2d830c253d0678a3b1e8e0bbfa5f4d8c3 SHA-256: 847a49eee0853206532c464505dcaf6f0354c8c5a9630896fb5bb0de75f616bb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, under the guise of providing game hacks. The document body and extracted URLs suggest a lure for users seeking in-game advantages, which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or redirection attempt, likely serving as a first-stage lure.

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-cheat-at-boku-no-roblox-remastered-game-hack In PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/roblox-execiter-hack.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-april.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/buy-robux-free-2021.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/roblox-profile-picture-free-to-use.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/roblox-console-robux-hack.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/free-murder-mystery-codes-roblox.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/how-to-get-a-free-gamepass-on-roblox-2021.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/cheat-engin-robux.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/do-you-want-free-robux-get-unlimited-robux.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/roblox-continue-as-a-guest-for-free.pdfIn PDF document text
    • https://freerobux.cyouIn 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
stream_003_off000042f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42F0 25464 bytes
SHA-256: 1f3a40eef8cb8c089344813a17a79082dd993d2b9b2c6d04e5000cae2f79c859
font_01_sfnt_off00007e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4A 19192 bytes
SHA-256: 274dba111ed5cfe53a99a5ba36d5fd19db941ce765912a0dbb533b5fe1eb4d48

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