Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a5dfe9a594861e…

MALICIOUS

PDF

33.9 KB Created: 2021-06-26 11:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ddfc38eaf8f410bdf610e198bcad53bf SHA-1: c8d11a0ca9d7f37c6a34f3328cd48532e643fc69 SHA-256: 10a5dfe9a594861e96d5426362f2424aad35e588fb01f8ec5e224daeb6272781
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free game hacks and accounts, directing users to a known malicious redirector. The embedded URL http://netcdn.co/app/431946152/free-roblox-accountws-game-hack is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

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/free-roblox-accountws-game-hack In PDF document text
    • https://iear.com.tw/image/data/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/pubg-uc-official-app_GM1330123889.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/roblox-island-life-paradise-hack_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/i-want-robux_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/spin-link_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD7 22220 bytes
SHA-256: ac311413c43890947b4853a6a079bd99f39730c691181a853567b1e552b1da22
font_01_sfnt_off00005f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4C 19056 bytes
SHA-256: d2662c7df1556cec6fbd46e90c531a60c22bf7d8f46be6e202f279bf2e915bb3

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