PDF malware analysis — malicious · 838f32b487de6157

MALICIOUS

PDF

43.3 KB Created: 2021-05-19 00:04:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: b9822e5227a6fabbac61c288fbeedd11 SHA-1: c0243f9b4378d935d7b764d7df0335f05f18506b SHA-256: 838f32b487de61573eb99a1132f27736b77c8182133c7e50f0b3d309342ea999

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and extracted URLs suggest a lure related to free Robux or game hacks, aiming to trick users into visiting the malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/robloxhero.xyz-free-robux-game-hack In PDF document text
- http://www.readandenjoy.ae/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/free-robux-legit_GM431946152.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/robux-apk_GM431946152.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/roblox-font-free_GM431946152.pdfIn PDF document text
- http://www.readandenjoy.ae/userfiles/files/free-coin-master-spins-hack_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
`stream_003_off000048f3.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x48F3	27044 bytes
SHA-256: `56591cf3c666e19632b4671a5767e483054727f029eaea370044ebdd71397258`
`font_01_sfnt_off00008637.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8637	18584 bytes
SHA-256: `d96645d743d7bc7e16305d404e9ae036d13b2ec1544ce4a3e073a2af54c3cd1e`

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