Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa35d11584f9666…

MALICIOUS

PDF

44.8 KB Created: 2021-05-11 17:10:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9e62f282f65e30570c1b82cf5495c18f SHA-1: 2265ef10fcdf825c4ed4bd4ac8c7f6e9a5ff233b SHA-256: efa35d11584f9666c1282110af8d53f0b29d29702b0ca6bc35afc8744febaaae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to external PDF files hosted on suspicious domains, suggesting a link farm designed to distribute malware or lead users to scam sites. The presence of a malicious redirector link further confirms the malicious intent. The document body and embedded links promote downloads for games and cheats, indicating a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/minecraft-pe-apk-download-free-0.15-0-game-hack In PDF document text
    • http://wireprod.net/images/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://wireprod.net/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://wireprod.net/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://wireprod.net/images/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://wireprod.net/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://wireprod.net/images/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://wireprod.net/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://wireprod.net/images/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://wireprod.net/images/coin-master-hack-tool-exe_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_off00004ee2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE2 26180 bytes
SHA-256: 6190a93bec2771c250fe0e42b70934165b0c563f87f01005712690ab2d4704ec
font_01_sfnt_off000089f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F5 19268 bytes
SHA-256: 28dc74618e8b02129b424bb36b85fc5c3aa5d44cc182401491d55e46ac5e52ed

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