Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa4c534258d0e27…

MALICIOUS

PDF

84.7 KB Created: 2021-07-16 00:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73425dc7b01e070af56ff2c1321d27fb SHA-1: 1dacb87b5febf7b247560d5e349d0fd517a0c0a3 SHA-256: daa4c534258d0e277d382633e07acd88fc577052046dd9f9e505eee8dc73f10f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. The presence of an embedded URL, although marked as benign, suggests a potential phishing or redirection attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the overall structure and heuristics point to a malicious document designed to trick users into navigating to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/nCRFBnYrBHY/square?utm_term=ionization+by+collision
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f01087e4fb0f110d7c4533/1626345607336/50625142777.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7cc1b8f757b1ac450d316/1625803803349/zoxub.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f051e1bb85c5336a630bb0/1626362337427/kibutoloxasisegalazofawe.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0a30f49e05c7e2e649c60/1626383119727/more_excited_than.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e876a519c8e408f4042b28/1625847461994/suwesurejinuxejive.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0a4fe9a456f4cc409d79a/1626383614546/types_of_aggression.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f05855f33aab2f6e34f6a5/1626363989749/long_division_problems_7th_grade.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8174e6e46386ca3c2fde2/1625823055215/24036897225.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f00e7ee4fb0f110d7c2ddb/1626345086649/5717237692.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eddcea4485e4216901a91a/1626201322552/nivopixutipesuji.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C6 16792 bytes
font_01_sfnt_off0000ecd7.bin
5fe250aed078d0ee0c8a6eeae28bcf3660a94536c0a26c91209d7ae7f0165d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 16180 bytes
font_02_sfnt_off00010249.bin
022ed3462a0804ed034be7d6581e4e37b1c04483a437a9d030c1e8c4d6fc482f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10249 16972 bytes
font_03_sfnt_off00012ee7.bin
747edc649f28eb08c58d9ea52e76ca4c5a63216c0ee9ea592061b04bcc382cbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE7 10256 bytes

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