Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c31a6770c75adf…

MALICIOUS

PDF

35.9 KB Created: 2021-06-29 19:33:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 380adca778780a32f78414f9e1e25696 SHA-1: 0994f9341741bf0945da1db00c933be6809a44dc SHA-256: 81c31a6770c75adf8c80becce7d450285cf8a0ed2e9a4b38633c409d45fed08a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be game-related cheats or generators. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirector workflow, likely intended to deliver further malware or lead to credential harvesting. The ML classifier also flagged this document with high confidence.

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/jump-fly-hack-roblox-game-hack In PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/get-clothes-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-get-robux-for-free-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/gamestop-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-hack-roblox-accounts-mac_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-roblox-game-card-codes_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/roblox-free-robux-android-1_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/https-pastebincom-incrible-hack-de-robux_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/roblox-hack-for-wls3_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-exploit-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/nombres-para-roblox-de-hacker_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-hack-someone-in-roblox-using-captra_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_off0000321b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321B 22956 bytes
SHA-256: a571bb26aea8b08c90f8fb85eef787b243314806d1a296013f386fbb0449c1d7
font_01_sfnt_off0000657b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657B 19744 bytes
SHA-256: db1174c9ea71f09f8f6a02f771fd7e8b36876be3c3de43c845bb7809510e96dc

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