Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ffbed1bfc99f7b…

MALICIOUS

PDF

72.1 KB Created: 2021-07-13 21:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 419985ac0b2d837367464db600ef19a7 SHA-1: dd289b80e874b27bc3d28501173407880ae5e869 SHA-256: 25ffbed1bfc99f7ba757abe9cdef5c1c3343791212ff1f822f15aad909e2cfd6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains embedded URLs that likely lead to phishing content, disguised as a document. The PDF_URI heuristic points to a URL that appears to be a lure for 'diary of a wimpy kid book pdf', suggesting a social engineering tactic to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6030

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/~3/4Ji06Fp1PxY/square?utm_term=diary+of+a+wimpy+kid+book+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec79c7dd2ac847ff7da60b/1626110407922/tavujawaziwexujaz.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec836d3a853d606aec8758/1626112877756/foundation_of_information_technology_class_9_solutions_chapter_2.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e93ffe2a6f785f583557e7/1625899006083/kuludewopiso.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8fcc0e7a3c5fba3e7065/1626116044647/vudafabod.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_off0000b85f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB85F 16792 bytes
font_01_sfnt_off0000d076.bin
7fb5b388ee2692cc8e3dfbff3bde4cc7fafe214696d5c18a8c44826a7cf8c271		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD076 10544 bytes
font_02_sfnt_off0000e846.bin
8eef170f6fd9eaa32d6e0833f4f416bb96e714f5308f0afceea78b9c109d12ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 16512 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.