PDF malware analysis — malicious · f6e0d0a6d5f50c59

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 14:31:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 8cb9bb060449a46f39cbb43664a82e83 SHA-1: 16bc99a9fd938b490a3fdd6effa14d928b21d91a SHA-256: f6e0d0a6d5f50c59824e3bbeb19519039468a981b569e1536eb5f33e8523191b

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains embedded URLs that point to a known malicious redirector infrastructure, designed to lead users to potentially harmful content or further malware. 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/431946152/free-robux-real-working-game-hack In PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-for-roblox-cheats-and-guide-download-hack_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-picture_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/how-to-get-vip-for-free-in-roblox_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-generatere_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/is-minecraft-free_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/roblox-phantom-forces-cheat-table_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.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_off00002faf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FAF	22392 bytes
SHA-256: `5fb253deb7013c1e9884e7b1450550bb41b3256036755091db44c6b07b183d9f`
`font_01_sfnt_off00006194.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6194	19280 bytes
SHA-256: `9945ffa193253d154cbce2906461b0c2a302f27e13cc5dbaefc5af262476b8d2`

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