Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2d978578cfc0cd…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 13:52:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 82b7b6997ce76e559a1b8af6decf07a1 SHA-1: 42f194099532a897a4e2e27007d5f8a8ad00940b SHA-256: 0e2d978578cfc0cdc9b0b6b54bf6d05ae77a72d066ee19c6fb064f39faa70e73
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a malicious redirector, specifically linking to a 'free generator / game hack' lure. The document body and extracted URLs reinforce this, pointing to sites offering game cheats and hacks. The primary IOC is the malicious redirector URL, which is likely used to deliver a second-stage payload or phish for credentials.

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/406889139/100-free-spins-coin-master-game-hack In PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/pokemon-brick-bronze-roblox-where-to-find-exp-share-free_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-free-10-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-robux-2021-control-panel_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/robux-hack-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-roblox-boombox-script_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roxploits-roblox-exploits-and-hacks_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-free-cloths-roblox-no-robux-or-inspect_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-hack-mad-merder-2-game_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_off000030db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DB 22532 bytes
SHA-256: 61764dcc314272a47ff079cbda664b0caf5edc7914e69479aada469368de6eb7
font_01_sfnt_off00006328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6328 18452 bytes
SHA-256: d0c04ff51ad59f6355ad4f24aeb86ad145506544650f67de66568f082738138f

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