PDF malware analysis — malicious · aad84beef01c4627

MALICIOUS

PDF

44.8 KB Created: 2021-06-08 13:58:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: d418ec50d0f791334d48dbe901f987c5 SHA-1: 299046c238c01aa1cbd79f925316bf575d00adab SHA-256: aad84beef01c46274535b6aec42abda426094b4d63981d4fb627b3bbf15655ca

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, directing users to external sites. The document body, though heavily obfuscated, suggests a lure related to 'free Roblox redeem card codes', which is a common theme in scams. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent, likely to download further payloads or redirect to phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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
External URI info PDF_URI

PDF contains an external URL action
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 https://netcdn.tw/app/431946152/free-roblox-redeem-card-codes-2021-game-hack
- https://ccej.lviv.ua/images/free-spins-for-coin-master-app_GM406889139.pdf
- https://ccej.lviv.ua/images/minecraft-build-hacks_GM479516143.pdf
- https://ccej.lviv.ua/images/how-to-hack-roblox-for-robux_GM431946152.pdf
- https://ccej.lviv.ua/images/how-to-get-free-robux-without-verification_GM431946152.pdf
- https://ccej.lviv.ua/images/comment-gagne-des-robux-free_GM431946152.pdf
- https://ccej.lviv.ua/images/free-spins-on-coin-master-2021_GM406889139.pdf
- https://ccej.lviv.ua/images/how-do-you-get-free-roblox-money_GM431946152.pdf
- https://ccej.lviv.ua/images/how-to-get-free-robux-codes_GM431946152.pdf
- https://ccej.lviv.ua/images/how-to-exploit-roblox_GM431946152.pdf
- https://ccej.lviv.ua/images/free-roblox-app_GM431946152.pdf
- https://ccej.lviv.ua/images/bux-gg-robux-free_GM431946152.pdf
- https://ccej.lviv.ua/images/blogspot-coin-master_GM406889139.pdf
- https://ccej.lviv.ua/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
- https://ccej.lviv.ua/images/how-to-get-robux-on-phone_GM431946152.pdf
- https://ccej.lviv.ua/images/coin-master-spins-2021_GM406889139.pdf
- https://ccej.lviv.ua/images/coin-master-gold-cards-hack_GM406889139.pdf
- https://ccej.lviv.ua/images/free-robux-generator-no-survey_GM431946152.pdf
- https://ccej.lviv.ua/images/minecraft-games-free-download_GM479516143.pdf
- https://ccej.lviv.ua/images/free-robux-just-enter-username_GM431946152.pdf
- https://ccej.lviv.ua/images/app-for-free-spins-on-coin-master_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000504f.bin` `698ec8850667c841f6cd5c366691f4574db793d883b61476de2764e9a69eeaf4`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x504F	25088 bytes
`font_01_sfnt_off00008a5e.bin` `5609d39c51755120cc2254111b6b9c9ded8233a24fc18963502c7732c411d0cf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A5E	19012 bytes

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