Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ec461cce15679f…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 19:18:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 84eb0265cb03415882cb4f13ac54b3ce SHA-1: cab3f450dfc32d890a8b4aaee113c1eb07642290 SHA-256: 53ec461cce15679f395fbd754e14e2574004012f800c1ec2dbd1e0aa0c5ba815
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links to known malicious redirector infrastructure, specifically pointing to a URL associated with game hacks. The document body, though partially corrupted, contains references to 'Coin Master Hack Apk' and similar lures, reinforcing the malicious intent. The presence of a visual download button heuristic further supports the conclusion that this document is designed to trick users into downloading malicious content.

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/406889139/coin-master-hack-apk-3.5-11-game-hack In PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-free-rewards-link_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.

FilenameKindSourceSize
stream_003_off00004af1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF1 24424 bytes
SHA-256: 20639571e8faafc3778aeb508bb89cc974af73051d0c4623ed7e670980986083
font_01_sfnt_off000082df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DF 18372 bytes
SHA-256: 17df93aaa0a20aa5c042e4bfc901dcd28212527af948c4b2f830898a8d4628be

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