Malicious PDF — malware analysis report

Static analysis result for SHA-256 a648beac3a2fb400…

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 01:24:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3b7453cff4444057edfb95a1610f6799 SHA-1: aceac47975cac95b76b21b263197c5c54333fdb3 SHA-256: a648beac3a2fb4001b4d527e4bfced6f4a5334614989b717a4a95d7afe774a24
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. These links redirect to malicious infrastructure, specifically a URL associated with a known malicious redirector. The document body and heuristics indicate a scam aimed at tricking users into visiting these sites, likely for further malware delivery or credential harvesting.

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/free-robux-zataf-plays-game-hack In PDF document text
    • https://pustaka.mic.sch.id/repository/best-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-dbz-legendary-powers-hack-script_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-how-to-make-gui-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/is-roblox-free-on-laptop_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/is-it-actually-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/lila-plays-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/street-kings-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/script-lua-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-free-pokemon-clothing_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-r-cheats-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-costume-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-hack-strucid-aimbot-non-detectable_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-color-name-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-jailbreak-how-to-get-vip-for-free_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_off00002d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8F 22356 bytes
SHA-256: 5f579b7e8abd224cbe6dcdde2d77a4cf09d6d6653826b95f2f64c2c5e7faabd5
font_01_sfnt_off00005f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F69 19320 bytes
SHA-256: e734c2b108001ca96d42b83073fae1df1b320b5b8e8a28a96d404c339ae6f13d

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