PDF malware analysis — malicious · 4b46e243c4811647

MALICIOUS

PDF

44.3 KB Created: 2021-06-07 02:51:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 8648602071b8d5e241fdac5e80cb42d1 SHA-1: cf54323e07b697a835c27863e3d088e0c89c7b24 SHA-256: 4b46e243c481164777e6da253e0d93ce9403e363a6f9fe23e85acb73d1a102f1

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically targeting users with lures related to game hacking and free in-game currency. The document body and heuristics indicate a social engineering attempt to drive users to these malicious URLs, which likely serve as a gateway to further malicious content or phishing pages. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score strongly suggest a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

Heuristics 3

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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.tw/app/431946152/how-to-hack-and-know-everyone In PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/robux-for-surveys_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/get-free-robux-info_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-coins-for-coin-master_GM406889139.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_off0000526d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x526D	23612 bytes
SHA-256: `0cd3df61b14de95c48541f437c9ae7a0846d73b7baffc0401207984f20aa50ba`
`font_01_sfnt_off0000881f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x881F	19032 bytes
SHA-256: `62a0c08c4f8ac517530423f8ddd3aa66cdb313bbcc304210808aa522cf9bd34a`

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