Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12bd1c3c9c10e58…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 02:09:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 67f9fc132e50fa5759b15efcedcd8283 SHA-1: fc29a6927307d5b80a70bae72f908cb54f46d429 SHA-256: d12bd1c3c9c10e582fc2a9867060d4d79cccd79549d4f299f208ac6299ab0c2b
160 Risk Score

Malware Insights

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

The PDF document contains embedded links that are identified as malicious redirectors, specifically leading to a lure for game hacks. The document body text and heuristics confirm the intent to trick users into clicking these links, likely to download further malware or lead them to a phishing site. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious redirection workflow.

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/431946152/how-to-hack-someone-on-roblox-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/mathep_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-jailbreak-money-hack-download_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/daily-coin-master-free_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_off00002eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDA 22320 bytes
SHA-256: 51e6c5042fc60ef76f4ab4032b7c254cd609bc38d8baff702e02f8a533c53e33
font_01_sfnt_off00006076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6076 19080 bytes
SHA-256: 963276ac3658a4f1303280410bd3aafd1a833c38ea79ed0af769875644ea58f7

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