PDF malware analysis — malicious · cae1a2d978a24057

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 05:43:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 16079bbc3d5f3113034a61c5e345fc6a SHA-1: 7b89bdf9ce2eb07814c61a90a6f5ad3c4f97b2b3 SHA-256: cae1a2d978a24057ca2712aa7b411db3f7423141bbe215df141563e769dbf8ed

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/479516143/wizard-hacks-game-hack PDF link annotation
- http://www.6636.com.tw/ad6636/upload/files/how-to-create-good-skin-free-in-roblox_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coin-master-free_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/roblox-create-a-free-account_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/diamond-hacker-roblox_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/roblox-free-stuff-codes_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-robux-bettergenerator-us_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/fastbucks-com-free-robux_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-robux-inspect-element-2021_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/roblox-hack-download_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/pokemon-go-free-0-iv_GM1094591345.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/easy-robux-generator_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://www.6636.com.tw/ad6636/upload/files/pubg-uc-generator-without-verification_GM1330123889.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_off00003524.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3524	22352 bytes
SHA-256: `07a3115c0441404c9e7da59a172e7375cad900fa192a56987db77f6e200098e3`
`font_01_sfnt_off00006676.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6676	18376 bytes
SHA-256: `f665832626808531659451e28624cfd6690abe3ebc4486c0e184f15273d13575`

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