Malicious PDF — malware analysis report

Static analysis result for SHA-256 044f1c6a32ecab5c…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 17:35:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: df981c76db273e51e565ee34e5aaf106 SHA-1: d23e1c84c72ff152c2a331aa2e9e402e0c5be005 SHA-256: 044f1c6a32ecab5c3402e8eaa5ecb1577b04a581fef6f0d8fbaa23cd637b6d5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/431946152/what-games-on-roblox-give-you-free-robux-game-hack. The document body and embedded URLs suggest a phishing or scam campaign aimed at users seeking in-game advantages. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a malicious redirector chain.

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/431946152/what-games-on-roblox-give-you-free-robux-game-hack In PDF document text
    • http://smkn1salatiga.sch.id/library/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/hack-anyone-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-hack-easy-2021-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-hack-sites_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-without-paying-any-money_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-robux-no-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/use-the-rarest-item-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/imaflynmidget-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/download-roblox-robux-hack-v-35_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-adopt-me-hack-script-pastebin-money-2021_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_off00002ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE5 22800 bytes
SHA-256: 7707ee8ea52d448970b20a77be520ebe3ddb1bd481e14a49eed5d477363be5d4
font_01_sfnt_off00006239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6239 19916 bytes
SHA-256: 8b19fd13ad5b08f11d9c4597e6f2a0c04d71b28f89248dcac2f5c29d09b121fb

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