Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54c46dc9902157f…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 02:13:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b39456a00413187e11eedd67d4551b08 SHA-1: c7c6d98f6776eb8dcd6ea5470ec1a648785800ff SHA-256: f54c46dc9902157f45600c11c1ac0fbde30e0304de9295282456858d978743ac
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of free game currency and hacks to entice users. It contains numerous links to redirector domains and SEO link farms, which are likely designed to host further malicious content or phishing pages. The ML classifier strongly indicated maliciousness, and the presence of a visual download button reinforces the deceptive nature of the document.

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.tw/app/406889139/coin-master-hack-tool-2021-game-hack In PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/changer-la-valeur-dun-nombre-sur-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/free-roblox-redeem-2021_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/how-to-hack-roblox-robux-with-inspect-element_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/roblox-free-robux-hack-no-offers_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/is-it-possible-to-get-hacked-through-roblox_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/free-robux-codes-tool_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/alone-battle-roytale-roblox-hacks-script-copy-aimbot-esp_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/como-evitar-ser-hackeado-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/rocash-earn-robux-free_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/free-robux-hack-using-inspect_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://www.avorganic.org/uploaded_files/userfiles/files/how-to-cheat-on-ramboredkill-in-roblox-2021-youtube_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_off00003149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3149 22504 bytes
SHA-256: 2aeaab03f493e3e8b4bf49eb1389907c9857e2982186b924643bba671e10cf62
font_01_sfnt_off000063a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 18480 bytes
SHA-256: 3dc977bc1210ceeedde7f87719dab6f525ca5e29bcd32cbe92ee8e1a0ab21cbd