Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33cd50d3dad4cee…

MALICIOUS

PDF

32.9 KB Created: 2021-07-20 19:20:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7cf7a0e3e918e5110ad69ca5c4227602 SHA-1: 8ba6e70dd88fe1c3a5d31d0b2788d48aa57f15de SHA-256: f33cd50d3dad4ceeeff182b8b5bcf77813a54cef4b008396f3e2d22f92782c60
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of free game items or accounts. The primary malicious link, http://netcdn.tw/app/479516143/free-minecraft-account-and-password-game-hack, is designed to lead users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack, likely intended to deliver a second-stage payload or lead to credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/479516143/free-minecraft-account-and-password-game-hack In PDF document text
    • https://www.liputanbali.com/assets/CKImages/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://www.liputanbali.com/assets/CKImages/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://www.liputanbali.com/assets/CKImages/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://www.liputanbali.com/assets/CKImages/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://www.liputanbali.com/assets/CKImages/files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.liputanbali.com/assets/CKImages/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.liputanbali.com/assets/CKImages/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.liputanbali.com/assets/CKImages/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.liputanbali.com/assets/CKImages/files/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • https://www.liputanbali.com/assets/CKImages/files/huskybuckscom-free-robux_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
font_00_sfnt_off00002bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BAB 22980 bytes
SHA-256: ad9449d4ce29643c1488675f7ae27299d95e59b48067ce8e3350c0c56a66beb1
font_01_sfnt_off00005e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8D 18344 bytes
SHA-256: 071cc331fbe0dfc1a6c0e7c1f1383f87707aabc4deba919dc9b38235f2b9b975