Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fe0e80bef3814f…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 01:28:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 10865875e5468e95d011223438f05db5 SHA-1: aff5c98962fbf7e7d3569efca82f39b2c2d35df8 SHA-256: 67fe0e80bef3814f18963d131322da9305e2639ebde785c8e0587878ec39702a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'Free Robux' and game hacks to entice users into clicking embedded links. The primary link, http://netcdn.tw/app/431946152/free-robux-apk-game-hack, is identified as a redirector, likely leading to malicious sites or further phishing content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for JavaScript execution or exploitation of PDF vulnerabilities to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-apk-game-hack PDF link annotation
    • https://tnupacktour.com.tw/image/data/files/i-want-robux-for-free_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/jailbreak-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-roebucks-com_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/despair-roblox-hack_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-speed-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/comoponerse-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-roblox-2021-accounts_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/is-there-a-way-to-hack-stats-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-walk-through-walls-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/roblox-strucid-hack-aimbot_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/pubg-uc-website-free_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF8 22460 bytes
SHA-256: ef6258fdcec70c0bbccec71a4eb40342c8e23c0c237e11546fcd4c4db67621a4
font_01_sfnt_off000061fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 19064 bytes
SHA-256: e83e6ec4c124ed2d7ca7106d3550dd0cc1129fb3ff046dea9d423b5a0bd21ead

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