Malicious PDF — malware analysis report

Static analysis result for SHA-256 d882bc999750d1e7…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 09:38:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e1dd6aaf972157888db8dd2f74ba0bc1 SHA-1: 203d9e4d9eda02f0acc5a9240bc7fbc116604198 SHA-256: d882bc999750d1e7522370d161675326f21d345c7b25e8e414c9de06fc112378
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a 'free generator / game hack' lure, which is a common social engineering tactic to trick users into visiting malicious websites. The link redirects to a known malicious infrastructure, indicating a phishing or scam attempt. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing lure.

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-get-free-robux-without-downloading-any-apps-game-hack In PDF document text
    • https://yeushuen.com.tw/image/data/files/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/roblox-hack_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/hack-client_GM479516143.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/pastebin-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/free-robux-actually-works-no-scam_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/how-to-get-the-free-robot-avatar-in-roblox_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/pokemon-go-free-money_GM1094591345.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/robux-online_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/youtube-how-to-get-free-robux-2021_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_off00002f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F15 20876 bytes
SHA-256: 0453291b0987c7c32557f065b88509f99772d04597ba581aa9e6fa266871cd49
font_01_sfnt_off00005c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C30 20240 bytes
SHA-256: 297e40e48bf98f909157546786ed8ef6c846caf78719244298106c3264496c18

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