Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0d54e170a3a429…

MALICIOUS

PDF

42.6 KB Created: 2021-05-11 08:02:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0ce9088d77b989ae886ddc903cc69c67 SHA-1: f4a3b2c47af6f95c0d13dc57f79216d1aafb6bec SHA-256: 6c0d54e170a3a4296748fd02fc12fe080a818f4ba7654c260f3ff3d654ca090e
180 Risk Score

Malware Insights

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

The PDF contains a large number of links to external resources, many of which point to IP addresses and known malicious redirectors. The document body and extracted URLs suggest a lure for game hacks or free resources, likely leading to malware downloads. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/479516143/wurst-1.15-game-hack In PDF document text
    • http://183.91.70.7//repository/free-game-packs-for-coin-master_GM406889139.pdfPDF link annotation
    • http://183.91.70.7/repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/how-to-get-roblox-premium-for-free-2021_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_off00004a0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0D 27020 bytes
SHA-256: 10cd14d04096ad31de671f79ee238da1c105c38400fba7673c90355ec2c002d9
font_01_sfnt_off000085ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AE 17864 bytes
SHA-256: b01281eee8ee309b19ac183d03e96fd9339da1edaab490a987cdf3c31f651974

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