Malicious PDF — malware analysis report

Static analysis result for SHA-256 854802ab70e130f1…

MALICIOUS

PDF

32.0 KB Created: 2021-07-19 21:15:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 49ea56daad4f5a81e628e7dcefd59b60 SHA-1: 269307dccf23c12aec4e030426570ea229323ee3 SHA-256: 854802ab70e130f181e2f93fbc0d492530155e9a96a4fb771c290fb2689a0547
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as free game-related content. The primary lure, 'Free Minecraft Printables', directs users to 'http://netcdn.tw/app/479516143/free-minecraft-printables-game-hack', which is flagged as a malicious redirector. The document body also contains a call-to-action phrase, reinforcing the deceptive nature of the content. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or scam attempt.

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-printables-game-hack In PDF document text
    • http://quatangthienthan.com/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://quatangthienthan.com/images/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.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_off00002c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1B 22216 bytes
SHA-256: 48a1941cb81dc337e8bc247fc0a896a9bddc8c65d71d806d73c02afc2ab19c43
font_01_sfnt_off00005c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4F 17956 bytes
SHA-256: e5df45a09fd76c24ea43a7fa28fc5fe559da15feee3d3577044ff876206ae01e