Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda0b04e837e79b9…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 22:12:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 39368e25ebe12ecfc44eb1d693f71909 SHA-1: 2678f32367ce119e9a8c1f1f8c14ac0af726720e SHA-256: cda0b04e837e79b93f381cad4a9566a2d63fc5811f9ff0e95c0efb9e166624c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game items, specifically referencing 'Robux' and 'game hack', which redirects to a known malicious URL. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or redirection attempt to malicious infrastructure.

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 http://netcdn.tw/app/431946152/promo-codes-for-free-robux-game-hack In PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-hack-roblox-account-with-cookie-editor_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/hack-de-roblox-volar_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/hack-genorators-roblox_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/online-free-roblox-no-download_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/hack-roblox-pour-les-simulator_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-noclip-and-fly-hacks_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-gift-card-cods_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-hack-robux-420_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/100k-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-hack-deathrun-2-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-hack-apk-2021_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-hack-no-human-verification_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
font_00_sfnt_off00003028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3028 22304 bytes
SHA-256: c61bee34399de67d77a65b500a27b3badcc680f0824f2b45f41eb09a628e7efa
font_01_sfnt_off00006201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6201 19304 bytes
SHA-256: 8f108eb77a448bab32907087749351f9dfb7449b9cf832684ec1eb90d477be7f

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