Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8e3cf45a96bb94…

MALICIOUS

PDF

48.6 KB Created: 2021-06-07 03:39:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f7d6320ec5c07d8ee1fec0b843f50cc8 SHA-1: a98526be492ce15d1a04a9b0f1183372436fcaf6 SHA-256: ae8e3cf45a96bb9429f3454c3e4873fb6faf70231c6e58bb2350ec0457227125
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links designed to lure users into clicking on what appears to be a free game currency generator or hack. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded links suggest a malicious redirector workflow, likely intended to lead the user to a further exploit or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/free-robux-codes-march-2021-game-hack In PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/robux-website_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/pubg-uc-id_GM1330123889.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000527b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x527B 25360 bytes
SHA-256: e4baf35256f9c4306bf8b2b675068e389eb97ddf64e4ec4d20194a1146aa4eb3
font_01_sfnt_off00008bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF1 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9898 19180 bytes
SHA-256: 8f597932db21d77313bbf167cc7199455ab0952c908bb8375814c2c9eb6d3e4e