Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1efa936f7af9ff2…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 21:05:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9366062bcd5dbcee60302dd3a427bffc SHA-1: 32383b79d5d23facb7fb08d51be89598b3cdf23d SHA-256: f1efa936f7af9ff28f2715a6e5e403ed4c705865b50e0e3b7ca3048dcf17d028
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body also contains this URL, reinforcing the lure. While no scripts were extracted, the presence of a malicious redirector and the lure suggest the intent is to trick the user into downloading a second-stage payload.

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/best-minecraft-hacked-client-game-hack In PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-old-roblox-accounts-pastebin_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-only-works-today_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/que-pasa-si-mientes-al-hacker-de-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/mm2-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-offer-website_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/google-moon-active_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/pubg-770-uc-ne-kadar_GM1330123889.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/hack-voir-information-personnel-sur-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-roblox-exploits_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_off00003136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3136 22408 bytes
SHA-256: 8e2bcba19e69d95b5a2c12602a4d62d743469516d38c0ba281aefe45781cb2c0
font_01_sfnt_off000062e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E8 18492 bytes
SHA-256: 86296843b88eed25728c8cc075b43780ca1cc7c9d5e807804b99454961e5616a

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