Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d661c65bec73eb…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 01:46:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f13b17c0137c1df8499b24dfa909ed45 SHA-1: 6d08392e85dd4a0835869b03f1f2f61477f1fc14 SHA-256: 07d661c65bec73ebb11f7a226c9d54152eb8a0d8101e199c946bc2c6abf48922
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hacks or free item generators. The primary link redirects to known malicious infrastructure, and the document body contains numerous other links to PDF files hosted on a compromised website, likely part of a link farm or SEO poisoning scheme. No scripts were extracted, but the presence of malicious redirectors and link farms indicates a phishing or scamming attempt.

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/coinmasterfreespins-game-hack In PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/emoji-puppy-tshit-roblox-free_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/app-master_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-30-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-promo-code_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_off0000325d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325D 22868 bytes
SHA-256: ca7ccddde9b509e1859a352a9bc5d91922d381c1089e11a596631581311ddfef
font_01_sfnt_off00006598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6598 18272 bytes
SHA-256: 07d1048110b648044dfdf05b80b578e3dafb2e438d2dd29495699789e7328ffb