PDF malware analysis — malicious · 0ef890c2b7a1f0d2

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 23:34:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02

MD5: 4492ac67ecd88a6766f2f32a33459539 SHA-1: 096008430a7e4cb1f7b28d2c6cf5069ed7b6f0a5 SHA-256: 0ef890c2b7a1f0d2e8c0c778d4ade06c6d4bc8d462e6e970c185bbbf954433e3

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/406889139/free-coin-master-coins-2021-game-hack PDF link annotation
- http://www.valenciamaids.com/userfiles/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-person_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/dayz-roblox-hack_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-2021-may_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-ingame-item-hack_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_off000031f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31F8	22696 bytes
SHA-256: `4fc50812fbc70109765be0314eed45cd01dc4cd8f8167b9762c3f836e80e8037`
`font_01_sfnt_off000064c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64C8	18400 bytes
SHA-256: `e5d3a6dc934cd1d6a3271fcf72c550eb6933cb497ca30567b0f4f4decc45aa51`

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