Malicious PDF — malware analysis report

Static analysis result for SHA-256 8005a701055f4580…

MALICIOUS

PDF

81.0 KB Created: 2021-07-13 11:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73afd2a3d3c5cf3ccd82c02846d4d221 SHA-1: 453587362bdfe4bac5b104f9a652b82a8ff1f8d4 SHA-256: 8005a701055f4580e91a6ed80f453d52034fbbc47b6829cc5e85625b5078b687
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. The presence of embedded URLs suggests a phishing attempt or a lure to download a secondary payload. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with common phishing techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9438

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://feedproxy.google.com/~r/sq/ugae/~3/W5vEtEh6t-A/square?utm_term=a+double+solid+yellow+line+with+broken+white+line+in+between+means
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ecef76ff6d86145b99e2a7/1626140534224/zomatujamatubozeserotuk.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e79dc9d93aeb546a10e174/1625791945501/sweet_bird_of_youth_full_play.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed13b8937216722047116e/1626149816975/kiperifejob.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecd0afab13250a0547fcaa/1626132655545/lujisajokigimixomitezi.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e79979efb14d11220d6cf0/1625790841603/bumupuwevo.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8e6b38ce0e10532cfc222/1625876147792/better_english_accent.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e942af025aa46e30d3e821/1625899695643/74016693795.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecdc39cdb2ce13c51edeb0/1626135609643/kikumudos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da1b.bin
860d3f97e84736d04c19fdff8f9424a48aebe3b1e5a0effe50e98b4c7aa66e4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1B 16680 bytes
font_01_sfnt_off00010572.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10572 16792 bytes
font_02_sfnt_off00011d89.bin
6cd3101afebda96d3c0a805df0dedc3a940270f0b91a69ec2eea5e12da7f0246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D89 11028 bytes

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