Malicious PDF — malware analysis report

Static analysis result for SHA-256 436d5b8ceed4b0ed…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 07:44:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 22453b634ab7d091922b16cb7a3fb49e SHA-1: dd6e49b7997ca7f218e7dd502ccee7e84650a13c SHA-256: 436d5b8ceed4b0eda3339931fedad5589c39dd9e4ea346821cc8e880f4773545
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free robux' to lure victims. The primary redirector URL is http://netcdn.tw/app/431946152/robloxhacks-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

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.tw/app/431946152/robloxhacks-game-hack In PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/hacks-para-counterblow-roblox-offensive_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/cheat-roblox-lumber-tyccon-fly_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/como-usar-hacks-en-cualquier-juego-de-roblox_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/2021-unpatchable-how-to-noclip-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/new-hack-for-roblox-2021-novemeber_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/cheat-engine-66-roblox_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/hacks-for-pyramids-roblox_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/ban-hack-roblox-moi_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-source_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/scp-anomaly-breach-roblox-hack_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_off00003159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3159 22780 bytes
SHA-256: 7ff59d98d0c020ff225f5929324ff7677a8a60bb8b1b88ecf407c844a7be9be1
font_01_sfnt_off000063f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F7 18820 bytes
SHA-256: 2ccea82525463c59d3ef013baba30ec334edef503592fdffe768c3dcf14999d8