PDF malware analysis — malicious · 310e2ae06d184fec

MALICIOUS

PDF

34.9 KB Created: 2021-07-09 18:41:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: b875d339bf943049d5d1fbcc1f254a8d SHA-1: b15ef03157b1e0da90eb96d77db693424de3ec66 SHA-256: 310e2ae06d184fec29082a74cf75ec89f753b0b52ab7473ef86d9756cd9d8680

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a URL in its body, all pointing to websites offering free in-game items or currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded links and the nature of the lures suggest a phishing or scam attempt, likely leading to a second-stage download or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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/free-robux-pins-game-hack PDF link annotation
- https://jasabuatlabel.com/ckfinder/userfiles/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/how-to-get-bear-mask-free-roblox_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/roblox-pajamas-for-boys-free-shipping_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/scam-free-robux_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/roblox-escape-room-cheats_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/free-youtube-roblox-banner-template_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey-2021-no-password_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/v3rmillion-roblox-hack-download_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/cheat-dbr-roblox-ccv3_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/minecraft-free-exe_GM479516143.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/ban-script-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
- https://jasabuatlabel.com/ckfinder/userfiles/files/free-admin-roblox_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_off00003113.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3113	22676 bytes
SHA-256: `35784bb4725c5bf36c7ecf2bfa6b3957ec8a2c387c0e77d7f111dc99f81a372e`
`font_01_sfnt_off000063bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63BF	18992 bytes
SHA-256: `e2f6e7493aec948a310ee99e045c3bc4058c5863f97c0ca4c5f0464a4f6a53a8`

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