PDF malware analysis — malicious · 929dc4937a3dd185

MALICIOUS

PDF

34.6 KB Created: 2021-07-09 11:55:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23

MD5: eae448e7fd40742496d08b5bf021b5df SHA-1: 03d3ccec87f36ef966896b865af504c4eba704e3 SHA-256: 929dc4937a3dd185b41a13f96f0f87bbffe2126284cbc074379bf69966e9f63a

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 4

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/431946152/robux-hacks-2021-game-hack PDF link annotation
- http://www.6636.com.tw/ad6636/upload/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/how-do-you-buy-robux-for-free_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coin-master-spins_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-robux-site_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-robux-on-computer-2021_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/robux-hack-2021_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/roblox-hack-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/cupcake-hack-roblox_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/how-to-hack-stats-on-a-roblox-game_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/como-usar-cheat-engine-en-roblox_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-app-rewards-roblox_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-roblox-giver-roblox_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/roblox-free-robux-code-2021_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/my-roblox-account-got-hacked_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/how-to-get-free-robux-instantly_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_off00002f33.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F33	22700 bytes
SHA-256: `79755fd13dfb29efc164a6536cbf0e227576e5e8ae0cdf6bac958f0a2bfe530a`
`font_01_sfnt_off000061cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61CD	19124 bytes
SHA-256: `5acc4cb5eca619de91ddb47cdc70e87d550a63f617f877071c9ac47b9f2637f1`

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