PDF malware analysis — malicious · bebef02146e4091d

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 06:04:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 69e858880f1af9889edc9d6724de4091 SHA-1: 8859e211a705151fd61261576c45a6c4631e2abe SHA-256: bebef02146e4091d6a82b5b1b119c066f578a01fe9e76104d2d77ad87d87506c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector pointing to 'http://netcdn.tw/app/406889139/coin-master-spin-link-free-download-game-hack'. This link is presented as a lure for game hacks and generators, indicating a social engineering tactic to drive users to potentially harmful sites. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/coin-master-spin-link-free-download-game-hack In PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/safe-hacks-for-roblox_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/10-robux_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/best-free-games-to-play-on-roblox_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/change-roblox-username-free_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/how-to-get-free-robux-in-roblox-2021-iphone_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/minecraft-tools_GM479516143.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/how-to-hack-and-get-robux-2021_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-hack-de-dragon-ball-rage_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/comment-installer-un-cheat-sur-roblox-invincible_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/how-to-hack-minecraft_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.

Filename	Kind	Source	Size
`font_00_sfnt_off00003673.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3673	22688 bytes
SHA-256: `891d266dcd5ece2f3622a0846aecb7473bedb504162be689b04d801ef516e628`
`font_01_sfnt_off00006921.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6921	18924 bytes
SHA-256: `6c9fc4b842f56e3af646613dc7badc2297397bf3a50ca7e340d3e13bb2109170`

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