PDF malware analysis — malicious · f107cfb86e83c77c

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 17:47:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: b2fe53bd7951946cf97a8ff7ebbfcb1d SHA-1: 311b10a7ed63ed100ffdf300d8fe856bf9c8b4bf SHA-256: f107cfb86e83c77cf895e1777bfc73111df125d9a91c9b61e100da02e7e747a2

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are related to game hacks and cheats, indicating a lure for users to visit potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' heuristic further supports the malicious intent of directing users to external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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.xyz/app/1330123889/pubg-600-uc-price-in-pakistan-game-hack PDF link annotation
- https://dr-willmer.de/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
- https://dr-willmer.de/images/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
- https://dr-willmer.de/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
- https://dr-willmer.de/images/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
- https://dr-willmer.de/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
- https://dr-willmer.de/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
- https://dr-willmer.de/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://dr-willmer.de/images/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
- https://dr-willmer.de/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
- https://dr-willmer.de/images/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
- https://dr-willmer.de/images/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
- https://dr-willmer.de/images/download-hack-coin-master_GM406889139.pdfIn PDF document text
- https://dr-willmer.de/images/free-robux-app_GM431946152.pdfIn PDF document text
- https://dr-willmer.de/images/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
- https://dr-willmer.de/images/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://dr-willmer.de/images/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
- https://dr-willmer.de/images/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
- https://dr-willmer.de/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
- https://dr-willmer.de/images/pubg-uc-giveaway_GM1330123889.pdfIn PDF document text
- https://dr-willmer.de/images/how-to-hack-coin-master-spin-ios_GM406889139.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
`stream_003_off000046f8.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x46F8	25132 bytes
SHA-256: `471f23d548345249ea3bc2945a822b3fb68aa4d675fa3a7e4b7a136239f89dbd`
`font_01_sfnt_off00008030.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8030	18860 bytes
SHA-256: `a1b57384fc447e71aae0cf8ee03723a881cd9a2b209fb0f4742074b939712d41`

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