PDF malware analysis — malicious · f2b13ac49b4281d4

MALICIOUS

PDF

36.3 KB Created: 2021-07-03 12:45:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: a3fd8da20c2bc08b7dee9801ad5e5297 SHA-1: da643eed63eedfb71a3992c37a16f7c3bb592898 SHA-256: f2b13ac49b4281d477eeeff2904af7c79a44a4953e921fb06b08eeb915391aa9

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/coin-master-free-spins-link-blogspot-april-2021-game-hack PDF link annotation
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/minecraft-xbox-free_GM479516143.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/how-to-make-free-roblox-audio_GM431946152.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/apk-roblox-mobile-hack_GM431946152.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/cocaine-roblox-hack_GM431946152.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/is-pubg-uc-hack-possible_GM1330123889.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/roblox-frog-hack_GM431946152.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/roblox-ben-10-games-for-free_GM431946152.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/free-robux-hack-no-survey_GM431946152.pdfIn PDF document text
- https://ombalicargo.com/new/public/ckfinder/userfiles/files/free-robux-cards_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_off000034f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x34F7	23132 bytes
SHA-256: `0e405afe8925672458602aa52ee63bbfe0860f4c531996f0bfaaf4cc10ede43c`
`font_01_sfnt_off0000690e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x690E	19036 bytes
SHA-256: `ef972ac8b6f0d301ec64deecd99ee3108bd9315cf8785a49d8f43646f678be13`

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