Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb16f88a9fe61c29…

MALICIOUS

PDF

80.2 KB Created: 2021-07-16 04:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e7815b87e22d2efb05c935226c3f1ba SHA-1: 26458ad6eb6ac81d1dc1020b55f0f8d29ee1e7f4 SHA-256: eb16f88a9fe61c29bd098f1ee8052ea305152155cee9b713ad3fe4bd028da375
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score. The presence of embedded URLs, though many are marked benign, suggests an attempt to lure the user to external resources. The file's structure and detection indicate it's likely part of a phishing campaign, aiming to exploit vulnerabilities or trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=calculate+psu+needed
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0821040a5bc6c0f772125/1626374672443/nothing_gold_can_stay_meaning_line_by_line.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edbaf7cd7e9b4eaed80317/1626192631299/pugexalutusomudimepe.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0a2ed70b87278e935b1f7/1626383085696/resume_templates_free_for_freshers.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8af3dbb514329fafe406/1626114803588/the_definition_of_indifferent.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee86e2114e6b7b7deacb96/1626244834792/all_city_name.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7ee2d4454ab0ddd86a4ee/1625812525854/58787526569.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f051f8bce14841941f758f/1626362360197/medical_biochemistry_an_illustrated_review_free.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f075c853310244143addc0/1626371528463/writer_of_forty_rules_of_love.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edc091a9d1f62037dfaab8/1626194065212/size_of_envelope_for_first_class_stamp.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee675007d0587a3765b30e/1626236752492/butafupalo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0af6fd1b82437b6feeb0e/1626386288149/degerunokubevefetonuzus.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0ce625d5998001029fff8/1626394214316/73418088744.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee8bd2f6c772366d32359e/1626246098501/wisufi.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_off0000d9c5.bin
5340a4d892f5c7068de80bfe552e0195b53765fe2f52a1dcc9b522c366f28d2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C5 10324 bytes
font_01_sfnt_off0000f13f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 16792 bytes
font_02_sfnt_off00010951.bin
36b97cd2467ef03a5ef8cae4c8df97ee1652ef7a1b75e2568768e94547001254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10951 16732 bytes

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