Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bd82313eca60fc…

MALICIOUS

PDF

42.3 KB Created: 2021-05-11 22:01:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 78746b1328230f713c655dc59b61a212 SHA-1: 2e9d81b666be05349f4a15bbd0b923d26e0f2e7b SHA-256: 76bd82313eca60fc30981808d7b9c04559942291c0a9cadc309654fd3cf1be06
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a website promising free Robux, a common lure for scams. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this link points to known malicious infrastructure. The ML classifier also flagged the document with high confidence. While no scripts were explicitly extracted, the document body contains multiple URLs that likely serve as the next stage of the attack, potentially leading to credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/uprobux.com-free-robux-game-hack In PDF document text
    • http://alexanderautos.co/images/freerubux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://alexanderautos.co/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/roblox-redeem-codes-free_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.

FilenameKindSourceSize
stream_003_off00004a52.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A52 24196 bytes
SHA-256: 6ba24947c4a127cf2a4646be38b3fc1fc057a802b523e9ef3595952cb17bb133
font_01_sfnt_off000081f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F7 18700 bytes
SHA-256: 143ab518bfe1873128e001b27a68cdab9711d8d723564be581f3f50f35f3a2b6

Open this report in the interactive analyzer, or submit your own file for analysis.