Malicious PDF — malware analysis report

Static analysis result for SHA-256 3631f7693dc8411e…

MALICIOUS

PDF

87.4 KB Created: 2021-07-15 23:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06a7981f524b95d8ade9a920bb55052a SHA-1: dec2fa72e789db6926daf0023b306beab9160ea1 SHA-256: 3631f7693dc8411e2975a786a728b99ac0dcad0cbcfb9f0daa30e2fde0a61543
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The PDF contains embedded URLs that point to external resources, suggesting an attempt to redirect the user to malicious websites. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate a likely phishing or malware distribution vector, consistent with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier clean score 0.1542

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/k6oGaauGqGM/square?utm_term=becoming+a+translator+an+accelerated+course+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e843d4ad723f3b6758dcb6/1625834452709/full_form_of_pcv_in_blood_test.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec780a82b4c978cf4062bd/1626109962712/netefelaravipodorisolov.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_off0000f2d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 16792 bytes
font_01_sfnt_off00010aef.bin
0978a0a0c2c9015f9845e9de709fde63aa92061a698a322e81884fe411a7ef22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEF 11116 bytes
font_02_sfnt_off000124af.bin
36c830bbe64214b2c2c060e7d5df51425c3a34bffeeb10e6b68780b7fb99f144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124AF 17068 bytes

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