Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abe4ebb95d29039…

MALICIOUS

PDF

45.6 KB Created: 2021-06-08 23:19:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 711bc7ec910c65dcff2096b9180a2782 SHA-1: 5139dedb19a824244182369fb3272692857b6918 SHA-256: 6abe4ebb95d29039e90a00a9177fd4d5eb483d0b6871f2b05d6926ede08d579b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at `https://netcdn.tw/app/431946152/hack-mod-menu-roblox-game-hack`. This URL is presented as a 'free generator / game hack', indicating a social engineering lure. The document body and embedded URLs suggest a scam related to in-game currency or cheats. No scripts were extracted, but the primary attack pattern involves directing the user to malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/hack-mod-menu-roblox-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/block-best-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/collect-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/freecoins_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/demon-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-card-collection-link_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_004_off00004f1c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F1C 27752 bytes
SHA-256: d3ec9717c87692b68d6b10d64f4a15263ae64dc681236ac0101d33d2e65174f2
font_01_sfnt_off00008e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3B 18692 bytes
SHA-256: 7615bf921390a17f61a9eca378a9c8508a67d2e79327162384c74f15bb845c76

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