Malicious PDF — malware analysis report

Static analysis result for SHA-256 097bb53502811957…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 05:23:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bafa2ab235963eb873798e069a0892a0 SHA-1: c3e14dcf1338093d6ac614ec51a5b2a138f811f4 SHA-256: 097bb535028119577a5b1b6d3e3ebb2f7130ec3a9298a08c4499def52fe852ed
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. It also displays a fake CAPTCHA to trick users into interacting with the malicious link. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/431946152/free-800-robux-game-hack In PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-coins-coin-master-blog_GM406889139.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_off00004e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E12 24092 bytes
SHA-256: af8df6a84dc760c65c57aea2ae1f128112e6f9496fd45e55b952ea4bed6ff1bf
font_01_sfnt_off0000852b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852B 18396 bytes
SHA-256: 2059a7894931e9b75336f5975f03d939213f3fdb926ff7d6db67df9fd1731cb7

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