Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5effb5fce5c1c2…

MALICIOUS

PDF

40.9 KB Created: 2021-05-14 17:04:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4a0b0d4c82980b00855aa0334c225490 SHA-1: 35f838423f54823dcac4469efa725ec7941a77f1 SHA-256: 2f5effb5fce5c1c27e814ee3a3b47243895640982d0efb0f0efcca8b80034fb7
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are associated with malicious redirectors and SEO link farms. The document body and heuristics indicate a lure for game hacks and free currency, aiming to redirect users to potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/robux-com-free-robux-game-hack In PDF document text
    • https://europe-upkl.eu/images/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://europe-upkl.eu/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-freebies_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://europe-upkl.eu/images/coin-master-hack-spins-app_GM406889139.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_off00004512.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4512 25208 bytes
SHA-256: c7d2f3660e26afd0e70afe13b90a52d8c82bebe001a8b5f2d7a907e9f8bc1bf8
font_01_sfnt_off00007d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D63 18276 bytes
SHA-256: 15a0db03ecad41b32ad15729058012b5ee1d917146ec7af3e780186d41394abc

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