Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27dded80ed28269…

MALICIOUS

PDF

45.7 KB Created: 2021-06-07 13:55:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 717c944f1653ff646c505c885b5d422b SHA-1: 70cb50b79714115802352a25d2a23b8e548ca2b2 SHA-256: f27dded80ed28269687ee90a7edcaa6dc641420d46aacfd7a478222406908762
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a primary link to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for game hacks or generators, suggesting a phishing or scam attempt. The presence of numerous links to other PDFs on a seemingly unrelated domain suggests a link farm used to distribute malicious content or improve SEO for malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/impact-hack-roblox-help-game-hack In PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/hacks-on-mad-paint-ball-2-roblox_GM431946152.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/pubg-mobile-uc-xyz_GM1330123889.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://www.ati-gulf.com/uploaded_files/userfiles/files/free-minecraft-premium-account_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_004_off000052e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E1 25752 bytes
SHA-256: 2486a47aa9f90ca999fbf337f46fc84c48d5f428c3ff81c16322c04131e9fbce
font_01_sfnt_off00008ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED8 18720 bytes
SHA-256: 0d1ab90b883918acda7a30535f4ec39a645f21ec7924869187f352d83fc1edfa