Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d45f0a5d5107600…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 21:19:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 20de1855dfa62b3a573c08a743d1c0cd SHA-1: 139e50de9a1ac848ef236b2353c25c2a7ad88b05 SHA-256: 1d45f0a5d510760025ef0a08f7aeea44baf8d90d48ff019a0700b517ee8c8891
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to attract users interested in game hacks and cheats. The presence of a direct download URL and the ML classifier's high confidence score indicate a malicious intent to deliver potentially harmful content. The document's content and structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-hacks-for-2b2t-game-hack PDF link annotation
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-nijna-legends-hacks_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-robux-no-waiting-pastebin_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-roblox-accounts-with-robux-v3rmillion_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-games-for-free-robux_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-get-any-car-free-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/descargar-hack-unu-para-roblox_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-free-admin-hack-2021_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/cheat-engine-55-roblox_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/assassin-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/dominus-free-roblox_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-old-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-get-free-stuff-on-roblox-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
font_00_sfnt_off000033ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33AD 22184 bytes
SHA-256: 05b959c3a5b3d6707ddb5609db720e127c6472592439a269fb250a59927bbd3f
font_01_sfnt_off00006495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 18508 bytes
SHA-256: ec36eda0ebebd8bddf593d51de7b201c00fd7abcd7bbfd15d51a883363834466

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