Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6900632a22a5ba2…

MALICIOUS

PDF

36.4 KB Created: 2021-06-19 08:57:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2629fb748327cc6b9dca6f81e1945e1a SHA-1: d7d3dda8450e86dc9fdd5e035608c8aad5a45f81 SHA-256: b6900632a22a5ba28dece87ca80ec537490498e38dec746f1b5ac05100b5b374
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, which is a common social engineering tactic to trick users into clicking malicious links. The primary link identified, http://netcdn.co/app/431946152/best-roblox-scripts-to-hack-games-feree-game-hack, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further exploitation or malware delivery.

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.co/app/431946152/best-roblox-scripts-to-hack-games-feree-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-on-roblox-jail-breaker_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/login-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-add-mods-to-minecraft-pe_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_off000034ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34ED 22892 bytes
SHA-256: 1df6d7b23e8d41ecfc1053e0ba0d4150abeb3f3150a526e8d12b4dd86bb41b42
font_01_sfnt_off00006836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6836 19480 bytes
SHA-256: 1b9b48d76cfca6329c5c9bdf6482acdc02cf1b504e7503504598ae5e99dd9b92

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