PDF malware analysis — malicious · e68ca87082aa26bc

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 05:08:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 021930ff201f2091d00f53e1c11be5a6 SHA-1: 7516b959ef35fe84f92c011f8cc7c320d05191cc SHA-256: e68ca87082aa26bc7caee1661f6fe99090aaa752e58e2d56c45bf5eb20552a68

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 0.9980

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 http://netcdn.tw/app/406889139/40-free-spins-coin-master-game-hack PDF link annotation
- https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-free-robux-on-android-phone_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/roblox-hack-client-free_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-free-robux-on-ios_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/www-free-robux-club_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/does-free-robux-eu-work_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/free-robux-secret-hack_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/roblox-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/is-it-illegal-to-hack-in-roblox_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/hack-de-roblox-sin-descargar-nada_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/joueur-de-hacker-sur-daycare-story-roblox_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/free-robux-no-human-verification-no-surveys_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/robux-life-hack_GM431946152.pdfIn PDF document text
- https://amozeshportal.ir/assets/uploads/pages/files/redeem-code-for-free-robux_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
`font_00_sfnt_off00002ffe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FFE	23044 bytes
SHA-256: `ebe5fb821d0b0ae57d0581fd8501a1c6570e2d127f523385788ab5f8bd1005c4`
`font_01_sfnt_off00006381.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6381	18408 bytes
SHA-256: `ce82454962f5f3d8f32b8d714c7dfb82c9591ccd0919bf0a26c63f76146bf830`

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