Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ca074510793138…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 13:03:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cf6b3e6a753a99010a783c088c6d6f0d SHA-1: b8faec81f39bbe42138cfc9c508d3083147a945d SHA-256: 94ca074510793138655d79ecf24a37f2606fdad220f0cd996e0fc2833a129966
220 Risk Score

Malware Insights

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

This PDF document contains multiple links to redirectors and external files, masquerading as game hacks and generators. The primary link, http://netcdn.tw/app/406889139/coin-master-free-attack-hack-game-hack, is identified as a malicious redirector. The document's structure and embedded links suggest an attempt to lure users to malicious websites, likely for further exploitation 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.tw/app/406889139/coin-master-free-attack-hack-game-hack In PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/doge-roblox-free_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-do-you-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/robux-hack-no-verification-survey_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/robux-recharge-hack_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-get-free-robux-gift-cards-codes-by-inspect_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-fbi-badge-roblox_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/athena-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/change-your-in-game-name-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-spins-coin-master-hack_GM406889139.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
stream_002_off000034cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34CD 22400 bytes
SHA-256: f0435754290347b7b393a5c773b74d8034149f8d27633a61bed794a06f86bc91
font_01_sfnt_off000066d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D4 18168 bytes
SHA-256: 77f95f04567bf1dae2980aee4eb06266131c8f3c94fbaa988a5df0c5268c5636