Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5566515bf4449c…

MALICIOUS

PDF

35.7 KB Created: 2021-07-10 00:13:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 111f8b516e923b7f0f841487f3b2b8a1 SHA-1: 3d25a0ca7929910376a352c24f804b003515d2b5 SHA-256: 7d5566515bf4449cf8eae8d169441f242021228d77f75759f7e63a831cbc505d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a 'free generator' or 'game hack' to trick users into clicking malicious links. The primary link directs to known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or malware. The document's content and embedded URLs strongly suggest a phishing or scam attempt related to popular online games.

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/free-roblox-gift-card-codes-2021-unused-game-hack In PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-to-get-any-roblox-gamepass-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/what-is-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-robux-really-works-2021_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/roblox-free-vip-servers-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-do-u-undo-someone-hacking-ur-roblox-acc_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-roblox-accounts-and-passwords-2021_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-kawaii-bread-t-shirt-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-blogspot_GM406889139.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
stream_002_off000030fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30FC 23100 bytes
SHA-256: 15bf464fdb25c46b8b56c901187283ce7078bb933bb631349871dda33d3c278c
font_01_sfnt_off000064f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F0 19588 bytes
SHA-256: d0050b22b1575b026cda5754e18fa76c7d99fd57f12d326042661e7eeaa340ba

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