Malicious PDF — malware analysis report

Static analysis result for SHA-256 160c600dc54ae842…

MALICIOUS

PDF

35.1 KB Created: 2021-06-20 01:32:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4b01e4279a8de4511c967fee5fd31321 SHA-1: ad103df5ae653f9142f4f284540ec5bde4ee4441 SHA-256: 160c600dc54ae84204eb1d19261e5723077ada982b6469d03dbfc3319029e75a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically luring users with promises of 'free Robux' and 'game hacks'. The embedded URL, http://netcdn.co/app/431946152/free-robux-and-limiteds-roblox-game-hack, is associated with known malicious redirector infrastructure. The document body and embedded URLs reinforce the lure of free in-game items, a common social engineering tactic.

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.co/app/431946152/free-robux-and-limiteds-roblox-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-maniac-free-catlog-bookmarks_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-server-side-explit-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-para-tener-robux-en-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-tell-if-your-account-is-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-today-instagram_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
font_00_sfnt_off00003142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3142 22416 bytes
SHA-256: efb67bab81b537a0b0101a0f0a479c9a975e8e15d604b759a0a25a2868d4e89e
font_01_sfnt_off00006318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6318 19448 bytes
SHA-256: 79d9ff381dd87472fc20139f1c9c2f7c3188f7eb14652082e903fde795d6eee2

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