PDF malware analysis — malicious · 7a11099ae1118cb7

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 15:11:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 82bf0bb0a3f8cd2faf5c4ac2d88daa07 SHA-1: 7158c5d2ac127c0691e7fbf333778da22a5b558e SHA-256: 7a11099ae1118cb723ad4c7b30886125d4202878e89ddd5f2d832a6aed59622d

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a lure of free in-game currency and hacks for popular games like Roblox and Coin Master. It contains multiple embedded links, including a critical redirector URL, http://netcdn.tw/app/431946152/roblox-help-free-robux-game-hack, which is likely used to deliver a malicious payload or lead users to a phishing site. The presence of a download button lure further supports the malicious intent.

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/roblox-help-free-robux-game-hack In PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-robux-2021-june_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/roblox-ftw_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-robux-not-a-scam-2021_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/roblox-free-games-folder_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/roblox-quick-easy-cheat_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/javascript-roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/how-to-get-free-clothes-on-roblox-2021-no-bc_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/hack-minecraft_GM479516143.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/broken-bones-iv-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/how-to-get-free-robux-for_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/roblox-free-robux-mkd-apk_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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000312a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x312A	21664 bytes
SHA-256: `8edaacdd60e7fa732eac295138e3e8bc441e2428ee01d4fc7572c5f722f19fb3`
`font_01_sfnt_off000060b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60B8	18968 bytes
SHA-256: `e6d3133e218776b7d87035f377c26f4245cc7a54287827524eb781a63c565006`

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