Malicious PDF — malware analysis report

Static analysis result for SHA-256 72110640044156d2…

MALICIOUS

PDF

32.8 KB Created: 2021-07-20 06:46:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6318dc3720a26646f70cb693c07ed62a SHA-1: 7dda19855ff2e18aef0cb6ce387f3250155158f5 SHA-256: 72110640044156d28383cb4267fddd7dce6966d64e1dfad5a852bf6d4a93e635
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 http://netcdn.tw/app/479516143/minecraft-skins-free-girl-game-hack. The document body and embedded links suggest a lure for free game-related items, likely to trick users into downloading further malware or visiting malicious sites. The presence of embedded links and the nature of the lure indicate a phishing attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/479516143/minecraft-skins-free-girl-game-hack In PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/real-free-robux-codes_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_off00002efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFD 22072 bytes
SHA-256: 32b591a430467027463f081dd65d41469ff728fd9cd087f5fa10febb2a2680e1
font_01_sfnt_off00005fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE9 17812 bytes
SHA-256: 7ce5d1bffc067a7697c6659b9f16d2693dfb8cdcb2edfb00fbdf7ce9282af41c

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