Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e15aa41f11497a…

MALICIOUS

PDF

34.1 KB Created: 2021-07-19 19:12:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9440871acfbc3c77da24a9338a32e660 SHA-1: 3629036e8504ef42294992d2911ce0c202946a03 SHA-256: 10e15aa41f11497ace8447a1c6d6faa4b987575dedbb223613214f7670825931
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure the user into clicking on a "free generator / game hack" which redirects to malicious infrastructure. The document body and embedded link annotations contain text and URLs related to game cheats and generators, indicating a social engineering pretext. While no scripts were directly extracted, the PDF structure and embedded links suggest a potential for further malicious actions upon user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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/coin-master-free-spins-link-2021-game-hack In PDF document text
    • https://pn-negara.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://pn-negara.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://pn-negara.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://pn-negara.go.id/new/public/ckfinder/userfiles/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://pn-negara.go.id/new/public/ckfinder/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://pn-negara.go.id/new/public/ckfinder/userfiles/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://pn-negara.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://pn-negara.go.id/new/public/ckfinder/userfiles/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://pn-negara.go.id/new/public/ckfinder/userfiles/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://pn-negara.go.id/new/public/ckfinder/userfiles/files/free-robux-accounts_GM431946152.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_off00002e80.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E80 23284 bytes
SHA-256: ef375e22f318adf5172b4b8c3114d3dd3157fe43997a5aaf912a03c7abfa1544
font_01_sfnt_off000062de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DE 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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