Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6aaa937f7938f0…

MALICIOUS

PDF

35.0 KB Created: 2021-06-18 17:03:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 53ec25f6a1ad8d158763e61034b73aaa SHA-1: 007b93f31bd6a211d503e65786ae57ea967a9d26 SHA-256: 0c6aaa937f7938f0d07fda37b4bf6166b8b59347463be831bf9332dad536f75f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple heuristics indicating malicious redirection and link farming, specifically targeting users with lures for game hacks and free currency. The document body and embedded URLs point to sites designed to trick users into clicking through a series of links, likely leading to further malicious content or downloads. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/wiki-get-free-robux-game-hack In PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox-jailbreak-hack-download-speed_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/hackaron-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-get-free-robux-easy-on-phone_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_off0000305c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305C 22644 bytes
SHA-256: ed9c0c1dff1eaf9c88c69d8c21c83f425ce00a3a2163f2307ed6b92ebe38498b
font_01_sfnt_off000062eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EB 19308 bytes
SHA-256: 62f3f0557a4c158869c96064494a10b22617b31def54d3a2054322b9590d6555

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