Malicious PDF — malware analysis report

Static analysis result for SHA-256 68779968cafdf296…

MALICIOUS

PDF

80.4 KB Created: 2021-07-16 14:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3f128fd6c8a73b2a86eee95e598f7f2 SHA-1: 43519a0d82004de8b7204e995860f975ab7f042f SHA-256: 68779968cafdf2963491518825dd9c36488cca06fa0c2cf0138beb9f214a3745
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URL that points to a suspicious domain, identified by heuristics as an external URI and flagged by a machine learning classifier as malicious. ClamAV also detected the file as a phishing trojan. The presence of an embedded URL suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9511

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://garglob.ru/square?utm_term=search+string+in+all+files+linux
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f04fa1b58f54589d080b23/1626361762057/endocrinology_personal_statement.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1678f1d653208009e4429/1626433423565/how_long_does_uncooked_chicken_stay_good_in_the_fridge.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8357a872c4c6263c85a26/1625830778738/48689212104.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f04ab6469a6a13e349ae72/1626360502956/nephritis_caused_by.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8718e47593a5cf72e7ce4/1625846158713/25763566355.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7dd83f7a034ccb79fff9/1626111449032/36315363163.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec81540cf33f708d7a2771/1626112340668/ginger_cat_meaning.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0f0210a71fd0da9aab283/1626402849298/meaning_of_smirk_in_tagalog.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_off0000d584.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD584 16792 bytes
font_01_sfnt_off0000ed9b.bin
06425e582eb6173aff03c33dc4f7281f68eb3105a45e2f5b0c33faff267c7abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 10772 bytes
font_02_sfnt_off00010655.bin
34b1de4e01d5f6520e7336b95d79596d177e8cd711c7703712ca00acee38ef8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 17852 bytes

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