Malicious PDF — malware analysis report

Static analysis result for SHA-256 d526dc37cf5b4e3a…

MALICIOUS

PDF

48.0 KB Created: 2021-05-13 21:39:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 735e3f31b1182c0ce8fa1978d7680cae SHA-1: ac72e864b15f7f58c77aafcfcd73ee9997613886 SHA-256: d526dc37cf5b4e3ae8e3e84d1378979f3508abb47500b188f9ef48f4b0d5a27e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which are structured to appear as SEO-friendly URLs related to game hacks and cheats. The document body and heuristics indicate a lure to click these links, likely leading to malicious websites or further phishing attempts. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-free-spins-today-new-game-hack PDF link annotation
    • http://gbp-trabkiwielkie.pl/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cc5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CC5 30276 bytes
SHA-256: b4a4caa85d8f6b1aee3f572370d05a610bb2c46e67917eea9dabef451d6ebe7b
font_01_sfnt_off00008efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFC 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000098ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98AE 18404 bytes
SHA-256: 18e77bbf6fe8462b755cd6d2d41f5b898be86405eb57ffa87df3bebfe1b33752

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