Malicious PDF — malware analysis report

Static analysis result for SHA-256 1810fc81800c6877…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 11:25:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 562f664286174ee57214aa7a81b19518 SHA-1: a8456c15ee52d5e38e08c7359745816c61de1680 SHA-256: 1810fc81800c68778a6e38a4fed3fb1057cba0417aa6b98ac8c3c649060b17d0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or downloads. The ML classifier strongly indicated maliciousness, and the PDF structure itself contained multiple links to similar scam-related content.

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/coin-master-free-daily-spins-link-2021-game-hack In PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-rpg-game-ad-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-promo-code-roblox-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/comment-hack-des-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-robux-no-verification-at-all_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
font_00_sfnt_off0000319e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319E 21952 bytes
SHA-256: 83974b8878dbd9cacfdd86ba465d3b35fe0b1ce91286ab4fe2e272e7dfbc2350
font_01_sfnt_off000061f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F9 19168 bytes
SHA-256: 9fcdcda61f85103260e2e142676e822332f3bbd5dbf2c81b53e1d0acf8c5ea6d

Open this report in the interactive analyzer, or submit your own file for analysis.