Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b0a08ce201471a…

MALICIOUS

PDF

82.5 KB Created: 2021-07-15 21:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1d4979f8b1ef7fa69496dc81f123839 SHA-1: 8137339807898608531e72e27421b02ae1400472 SHA-256: 87b0a08ce201471ae2d8eb03d9bd12364058eabfdcd5818c6bfe109d86274780
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs suggests the document may be used as a lure to direct users to malicious websites or download further payloads. No scripts were extracted, but the overall structure and detection results point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9627

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/~3/5JeRQhMeIYg/square?utm_term=good+exposure+meaning
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee07fe6bb0602df20d5bcb/1626212350892/kabuliwala_by_rabindranath_tagore_questions_and_answers_in_english.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d648c4ce500af844de16/1625871944945/cubs_theme_song.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7fedf1873c46ac93b01b8/1625816799605/rulalaj.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed8a9fc50d503b9d596077/1626180255862/gaxiwamidozim.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee4add2d09e34b72a11831/1626229469105/79239541570.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8cccb4c181567023ce574/1625869515266/leather_revolver_holster_patterns.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edc95fac614e13d12dad30/1626196319980/mimuvupalimoma.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0295e34f25751eec432f6/1626351967041/the_only_emperor_is_the_emperor_of_ice_cream.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_off0000e1c1.bin
a2fd5fab4f0a1cb5b66d3579a5820f2b05042f52112f86a2603b3c462ab94142
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C1 10832 bytes
font_01_sfnt_off0000fa86.bin
03980b07c22798809771cfb4dc842dd2b0dace77a994b9b1875c392558b39d76
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA86 16728 bytes
font_02_sfnt_off000125e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125E0 16792 bytes