PDF malware analysis — malicious · 81718b34979ed589

MALICIOUS

PDF

44.8 KB Created: 2021-05-19 18:13:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 9bcd3d016fd2f4d0cdd40e0a80994e07 SHA-1: c94ccea482bb61e0c6780962bdc569ea429c4858 SHA-256: 81718b34979ed5891d29755013fe1a70de0ae57777a991a695a9ca96a4fea32e

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and a prominent download link, suggesting an attempt to trick the user into downloading a malicious application or visiting a compromised site. The heuristic firings indicate a PDF link farm and a ML classifier flagging it as malicious. While no scripts were directly extracted, the structure and embedded links point towards a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

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/835599320/download-apk-tiktok-free-game-hack PDF link annotation
- https://www.devries-group.de/images/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/pokemon-go-free-download-for-pc_GM1094591345.pdfIn PDF document text
- https://www.devries-group.de/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
- https://www.devries-group.de/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/best-hacked-client_GM479516143.pdfIn PDF document text
- https://www.devries-group.de/images/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/free-minecraft-com_GM479516143.pdfIn PDF document text
- https://www.devries-group.de/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004943.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4943	24584 bytes
SHA-256: `dba808141c6668789667287cd50a5b5c5a42f8697e064171a9f6c574efff2f04`
`font_01_sfnt_off00008213.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8213	2940 bytes
SHA-256: `eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a`
`font_02_sfnt_off00008c23.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C23	18440 bytes
SHA-256: `f71df6ec77f0454804d10e47f4e85d9169386bc61606227d722edc0b01aa49ea`

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