Malicious PDF — malware analysis report

Static analysis result for SHA-256 8401cffdeb312786…

MALICIOUS

PDF

44.9 KB Created: 2021-06-09 13:39:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 77c15c5ed253e61b7de2dcfa54e81275 SHA-1: 642ef9330df61823a9cfc2825936eb375e3821d6 SHA-256: 8401cffdeb312786ec98d8f29256a942a16d7cdd83eee6fef84626fd3c9b579c
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are structured as SEO link farms for game-related hacks and downloads. The document body and embedded links suggest a lure to download malicious content, likely related to game exploits or cheats. The presence of multiple external URIs and a high ML classifier score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/roblox-blackberry-hack-download-game-hack PDF link annotation
    • http://artion.biz/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://artion.biz/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://artion.biz/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/free-robux-obby-youtube_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/youtbehow-to-get-free-robux-without-doing-surveys_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/youtube-roblox-get-free-money-on-rocitizens_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/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_004_off00005068.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5068 25940 bytes
SHA-256: e66df2260401ba0714e4b1c45fca6cac3fbb0a1ca11b5b938b935f2443637fb6
font_01_sfnt_off00008afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFE 18868 bytes
SHA-256: 35a09863786f48404d623d6dbfac61ca5a493b1598709883c430d11a40ac0a8f

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