Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ba156ef265d536…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 04:36:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 87d1549a4a359d448af44d145fa83e02 SHA-1: 5a19575b4d74b01199f8cd1999432d3597aec18b SHA-256: 08ba156ef265d536b7ea3aed25a2b5f32e1232458013e32d6810011bbca28be1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free in-game currency and hacks for popular games to entice users. It contains multiple links to known malicious redirector infrastructure, such as http://netcdn.tw/app/406889139/free-coins-and-spins-coin-master-2021-game-hack, which likely leads to further malicious content or malware downloads. The ML classifier also strongly indicated maliciousness.

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/free-coins-and-spins-coin-master-2021-game-hack In PDF document text
    • http://www.carpetbcfyarn.com/uploaded_files/userfiles/files/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.carpetbcfyarn.com/uploaded_files/userfiles/files/hacker-roblox-skin_GM431946152.pdfIn PDF document text
    • http://carpetbcfyarn.com/uploaded_files/userfiles/files/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.carpetbcfyarn.com/uploaded_files/userfiles/files/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://carpetbcfyarn.com/uploaded_files/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://carpetbcfyarn.com/uploaded_files/userfiles/files/roblox-online-us-roblox-hack_GM431946152.pdfIn PDF document text
    • http://carpetbcfyarn.com/uploaded_files/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://carpetbcfyarn.com/uploaded_files/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.carpetbcfyarn.com/uploaded_files/userfiles/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://carpetbcfyarn.com/uploaded_files/userfiles/files/pokemon-go-free-download-game_GM1094591345.pdfIn PDF document text
    • http://www.carpetbcfyarn.com/uploaded_files/userfiles/files/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://www.carpetbcfyarn.com/uploaded_files/userfiles/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://www.carpetbcfyarn.com/uploaded_files/userfiles/files/claimrbx-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.carpetbcfyarn.com/uploaded_files/userfiles/files/free-robux-december-hack_GM431946152.pdfIn PDF document text
    • http://www.carpetbcfyarn.com/uploaded_files/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.carpetbcfyarn.com/uploaded_files/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.carpetbcfyarn.com/uploaded_files/userfiles/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://carpetbcfyarn.com/uploaded_files/userfiles/files/egg-farm-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://carpetbcfyarn.com/uploaded_files/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://carpetbcfyarn.com/uploaded_files/userfiles/files/coin-master-free-spins-today-new_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
font_00_sfnt_off000030da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DA 22840 bytes
SHA-256: 007136b0dd1e58f01b722d3b8a706bbe982f59211859cebbb8ede72043ba6d65
font_01_sfnt_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 18752 bytes
SHA-256: 2808497b37fc1d4f34a1fffc3dd5e81983cd3403e98677a9ba5497e95ebc42c8

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