Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf5cb0b2cb39829…

MALICIOUS

PDF

75.1 KB Created: 2021-07-13 23:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9bc9e155e811e39131871d5de2c2d51e SHA-1: bc99afc144636f6f1c62e765f695633457f46a72 SHA-256: 2cf5cb0b2cb39829b8d6450bb367ad72bcbcdae34dbcb2a866229260c2fed5e9
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ClamAV heuristic identified this PDF as a phishing trojan. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure the user to malicious content or download further stages. The file's structure also indicates potential exploitation vectors common in PDF-based malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.2303

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/razvivatel/yapz/~3/UZrB20b2Dcg/square?utm_term=ttc+old+mill+station
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e780e97d8cdc52e74818a1/1625784553794/add_annotations_to.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7e13a1f8f93f64ab4a04/1626111507829/vizepopagibupezumilivu.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_off0000c3e8.bin
beb93fd435777504efcee0276de373c6ec9f3f37b8fc20f2fd03a74e85d3a10e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E8 10260 bytes
font_01_sfnt_off0000daee.bin
9455db1a8daf365c9c2f85d95b990fba821412ef93f8c9ecc55f8f348b340c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEE 17016 bytes
font_02_sfnt_off00010784.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10784 16792 bytes

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