Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc043e04feef7162…

MALICIOUS

PDF

44.7 KB Created: 2021-05-10 21:41:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 35e7e1855ddee003f30f24ad8ebee7b8 SHA-1: 0c5718c9151e707008c14aba135b264574d5e001 SHA-256: fc043e04feef7162133f0b81c3aaef44d2320f9e903d697216077806d12d39f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, masquerading as generators for in-game currency or hacks. The document body and heuristics indicate a lure for free Robux and game hacks, with a critical finding of PDF links to known malicious redirectors. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent, likely leading to further malware or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-on-iphone-game-hack In PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-pe_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/robux-withdraw_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn 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_off00004a21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A21 29992 bytes
SHA-256: 0c7b659a2b436bb927e5bb32ea4e528af96d044f72f60a9eff131a9497b95d84
font_01_sfnt_off00008c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C54 18356 bytes
SHA-256: 09002ce3ba94cfa5154e24d4605185e25e9b5ae3e76d565aeacf431b5bbbf1e5

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