PDF malware analysis — malicious · 85d6a8d7b5a2d922

MALICIOUS

PDF

35.4 KB Created: 2021-07-09 06:36:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 9c0c550c23b50c6d36f8ad9a7273b98e SHA-1: 85f0198eec2efb0d2b81a7b4311c6be710ef2bdd SHA-256: 85d6a8d7b5a2d9220f5f37c650da60863fe5a5ae66b3bdf7286bfde4e415839d

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirectors and potentially malicious sites, disguised as generators for free game currency or hacks. The ML classifier strongly indicated maliciousness, and the embedded URLs are known to lead to such lures. While no scripts were explicitly extracted, the PDF structure itself facilitates these malicious links, likely serving as a lure for initial access.

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/lazy-blocks-com-free-robux-game-hack In PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-hack-someones-computer-through-roblox_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-noclip-hacks_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/hack-jailbreak-roblox-police_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/ore-tycoon-2-cheats-roblox_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-and-builders-club-generator_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-generator-co_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-glitch_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-gear-hack-script-pastebin_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_off000031a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31A1	22620 bytes
SHA-256: `a5e5a808b767664af76fad81f83dd3c3d240df940574bb6b0201e5191cb4e713`
`font_01_sfnt_off0000642e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x642E	19480 bytes
SHA-256: `674b1dcba2a8a832e9ac54cd79118fcf3184e21139ebd106ccb57401b5375b65`

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