Malicious PDF — malware analysis report

Static analysis result for SHA-256 022025b01a2331e3…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 22:59:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: df8a3579d64ef91a755bcd61bc59a110 SHA-1: 9552fe8a45f40004613559035cca9a8a53698b44 SHA-256: 022025b01a2331e38a61860b9a6dae96fd334b9e78b6d65fcc18a9ada5ce7e2a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector, disguised as a 'free generator' or 'game hack'. The document body and heuristics indicate a lure designed to entice users to click on these links, likely leading to further malicious content or downloads. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/is-there-a-free-version-of-minecraft-game-hack In PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/toolbox-apk_GM479516143.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/minecraft-115-2-hacks_GM479516143.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_003_off00004b41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B41 25040 bytes
SHA-256: 313a07fb63549c85257d3bc7740d58cb59eb04f19703f7db2d7112d150294dfe
font_01_sfnt_off00008492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8492 18012 bytes
SHA-256: aceee9a041b582042c2100ba6115aff943c09cf12b5359888ef7326718d96eb0

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