Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5ecc754af03459…

MALICIOUS

PDF

41.9 KB Created: 2021-05-15 12:22:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fab323333f7c97c14ed6796e44508c4a SHA-1: 51688e1f863232116e57dd848ce9a26ff2b86fbe SHA-256: 4a5ecc754af03459c389ca52cf423eb04924734596e97d1c592ba046ad1aa9fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacking tools and generators. The document body and embedded links strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/how-to-hack-coin-master-using-es-filer-game-hack In PDF document text
    • https://bancroftandsons.com/images/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/roblox-girl_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/strucid-aimbot_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/roblox-hair-for-free_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
stream_003_off0000495d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495D 24668 bytes
SHA-256: d91a7a867e2153fb9a94051cff644bc596af3e838c29844d44dee6c448b10bf5
font_01_sfnt_off00008096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8096 18592 bytes
SHA-256: 7b6829f0c912f355393962c39643cd2cadf5d604c17bb92301d7763a729473f1