Malicious PDF — malware analysis report

Static analysis result for SHA-256 273e58a64b83ba68…

MALICIOUS

PDF

74.4 KB Created: 2021-07-13 03:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7c91421420bfc6ef3722a70ead70155 SHA-1: 68c82fde12585085718ae595971d303c8e7d3459 SHA-256: 273e58a64b83ba686993f0409fce670572a44c8ade88837eaed0fbb3f282b0b7
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan, indicating a malicious intent. The presence of embedded URLs, although many are confirmed benign, suggests a potential phishing or credential harvesting attempt. The PDF structure itself may contain exploits targeting vulnerabilities in PDF readers.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3118

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/gPkW7oTCsL0/square?utm_term=alex+rider+snakehead+review
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecd5f3f64979768eeb5747/1626134003752/scanned_document_into_word.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e812ad57d2352c927e9be9/1625821869843/10217134063.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_off0000c2d3.bin
df088c077daf6608157235b6f64c386682e51eafac3203fcaed745171e019231		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D3 10456 bytes
font_01_sfnt_off0000da84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 16792 bytes
font_02_sfnt_off0000f296.bin
bf3bfe27ca2d6d24dc13bb6b441de8927b118d71be5c342a089683cf4f50a46c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 16236 bytes

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