Malicious PDF — malware analysis report

Static analysis result for SHA-256 26929e02174496b5…

MALICIOUS

PDF

45.1 KB Created: 2021-05-19 00:08:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4bff68e93102f4280e57f6c8eee76289 SHA-1: 4ea66d50962801eaefde6ff540dccd869cd43ce4 SHA-256: 26929e02174496b52a1ddae2506ac5deac894590469f2a973519115afe0e276c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on `sfsbm.org` and appear to be part of a link farm designed to attract users searching for game cheats. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains references to game hacks and a URL that likely serves as a download point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/406889139/coin-master-3.5.33-android-hack-game-hack In PDF document text
    • http://sfsbm.org/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sfsbm.org/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://sfsbm.org/images/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://sfsbm.org/images/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://sfsbm.org/images/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C1 24784 bytes
SHA-256: d1fccd548acfda6532541400add21274048b238d91183eefb1cddee7781c85a1
font_01_sfnt_off000080fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FC 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00008d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D82 18264 bytes
SHA-256: 55c2b7ac9e268c18f22df13ff8772fb9709c3f9370fdb7d4bb72adcf8037ad96

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