Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd733ea3f4036b1…

MALICIOUS

PDF

82.9 KB Created: 2021-07-17 13:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f3f750509c6c1d19e4eb4821e41a009 SHA-1: 544d4d3b4e408354a1569dc46fe5a7de10927845 SHA-256: 0bd733ea3f4036b161b6c96001aadc954c4e45b59d2e45cba043eb6fc0a1033e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URIs suggests an attempt to redirect users to potentially harmful websites, aligning with phishing or malware distribution tactics. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are sufficient indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/~3/1LSSs5qy-i4/square?utm_term=sd+movies+point+2012
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eda8ad1374dd6a9a64929f/1626187949278/petersens_field_guide_to_cthulhu_monsters.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ed538915684aa53ab9c0/1625877843379/701902775.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f15825f75f957e35b8ff3d/1626429477339/the_rules_of_love_richard_templar_free.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1d5b04e7c686a32cbc093/1626461616130/acls_free_practice_test.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed3787cdb2ce13c52407d9/1626158983767/fogevukibuzoribinemadima.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1217d3d214e0c07815adf/1626415486089/ragewapisu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eda08d37bfc37e3c237ec3/1626185869800/make_miracles_in_40_days.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e80642ed7e63043965d884/1625818690713/articles_of_co_partnership.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f26dcf8c10a93e50440bca/1626500559242/tikabovewirivoni.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_off0000e147.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 16792 bytes
font_01_sfnt_off0000f959.bin
011859f030a68fc82642388f2fb0d5ef0fb6ac1a980fc7c9fe0ed065a0ab354c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF959 17096 bytes
font_02_sfnt_off000125bc.bin
c421ec37c2e7a8b084ae7650d2f78b1015e13bb0a85ffa9413c1035029befcde
pdf-font-stream PDF embedded font (sfnt) at offset 0x125BC 10680 bytes