Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05d1ff76997d5cd…

MALICIOUS

PDF

42.5 KB Created: 2021-05-16 15:00:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7246e66fcd15b2b92f5a6b9b47e8e10c SHA-1: 1a82cfbcf5c68d03030993df960e007abf1188b9 SHA-256: b05d1ff76997d5cda6cab2aa5764b89559a50b8c50f6a4744581a8f9304e96e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that lead to known malicious redirectors, disguised as generators for popular games like Coin Master and Roblox. The document body and heuristics indicate a lure for free game items, aiming to trick users into visiting these malicious sites. No scripts were extracted, but the presence of multiple malicious links strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/free-spins-coin-master-links-blogspot-game-hack In PDF document text
    • https://jdlgroup.ca/images/coin-master-cards_GM406889139.pdfIn PDF document text
    • https://jdlgroup.ca/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://jdlgroup.ca/images/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • https://jdlgroup.ca/images/free-robux-today_GM431946152.pdfIn PDF document text
    • https://jdlgroup.ca/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://jdlgroup.ca/images/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • https://jdlgroup.ca/images/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://jdlgroup.ca/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://jdlgroup.ca/images/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://jdlgroup.ca/images/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://jdlgroup.ca/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://jdlgroup.ca/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://jdlgroup.ca/images/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://jdlgroup.ca/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://jdlgroup.ca/images/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • https://jdlgroup.ca/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://jdlgroup.ca/images/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://jdlgroup.ca/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://jdlgroup.ca/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://jdlgroup.ca/images/coin-master-free-spins-link-31-march-2021_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_003_off00004934.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4934 25616 bytes
SHA-256: 92370ef51e032f10791247e29d2c7d0da12f2f83c51862bdc86637a17ebddd97
font_01_sfnt_off000082eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EB 18632 bytes
SHA-256: e19cb03e4db5dc0ff2825ab1b6cd29120edbbac4e5fd870bab1836bcb421f615

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