PDF malware analysis — malicious · cc85898e798873b9

MALICIOUS

PDF

43.2 KB Created: 2021-05-14 01:36:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 785e7135b51f4a770c1c18bd1f378ddf SHA-1: de038d9d9d00afd3e2c7202dded6a1d4692e405d SHA-256: cc85898e798873b92e908e725714340854ecfc0c6aa08d17d33e8db9f325dce0

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 5

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.
PDF links to a 'free generator / game hack' redirector high 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.
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/406889139/card-hack-in-coin-master-game-hack PDF link annotation
- https://www.dc-itsolutions.com/userfiles/files/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/minecraft-items_GM479516143.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/get-free-robux-info_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
`stream_003_off00004bcc.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BCC	26016 bytes
SHA-256: `b4393e6c7f7ef1998ac5f995597f04761562dfce9e8991a141290fbf7c35f0f8`
`font_01_sfnt_off0000878f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x878F	17888 bytes
SHA-256: `eac9cb42de6513dc6552a50abee069bf35bf7768323d30e076f8ef6ec09f6223`

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