Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d6e2d40e5b228f…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 21:47:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f764c14eef213834460312c373b3a4b7 SHA-1: 7d6871367b001292c07e907f3d4ec238a306534b SHA-256: e5d6e2d40e5b228f5b2b6dd7888556b0df635529fa4617f1031911ef8305f06a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this, with the primary URL being a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it's designed to lead the user to a malicious website, likely for phishing or to download further malware.

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/406889139/how-to-get-coin-master-card-free-game-hack In PDF document text
    • https://www.taline.hr/files/how-to-get-robux-free-easy_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/roblox-credit-card-free_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/free-font-that-looks-like-roblox_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/roblox-robux-artmoney-hack_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/how-to-get-robux-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/how-to-get-a-free-2021-robux_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • https://www.taline.hr/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.taline.hr/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-hack-apk-july-29_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
font_00_sfnt_off00002e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8C 22680 bytes
SHA-256: d1a19e7ab4aaaa09c281d80653bd4a50c334160296b0c2549524d34f6829bdd8
font_01_sfnt_off00006103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 18336 bytes
SHA-256: 2280f0e6fbe29086ff047cb2b73bb4cd092e46844cee65a644b638b322da15b8

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