Malicious PDF — malware analysis report

Static analysis result for SHA-256 88aa972e46800006…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 22:19:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 093751205e0a1e8c4495769f2eadfc4e SHA-1: 07d6e43e3fc0aacf3e934f8eb228db25c8815d79 SHA-256: 88aa972e4680000668b8cd8b2790b01ad71a73961bcff0c34d0100733b7fea19
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are flagged as malicious redirectors, specifically leading to a "free generator / game hack" lure. The document body text and embedded URLs reinforce this theme, suggesting a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing or social engineering attack.

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/479516143/minecraft-redeem-code-free-game-hack In PDF document text
    • http://www.inoxograde.hr/files/robux-giver_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-put-shirts-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-free-robux-on-roblox-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-apps-that-actually-work-quick-download_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/774-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-downgrade-minecraft-pe_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
font_00_sfnt_off000031bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BD 22136 bytes
SHA-256: d13f450eb68385d39f976c92538ad4afed319d806677efe823248c857b47d96c
font_01_sfnt_off000062fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD 18432 bytes
SHA-256: e00542d8802f7f3094baa1a46dd06b8460a806b53ddd700a8fbe3f626e4c3c25

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