Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8e30c02c289215…

MALICIOUS

PDF

79.4 KB Created: 2021-07-19 06:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47c86ab12753423705354ac855dd9b72 SHA-1: 4d3dd815ee426ab312ffd8c6ca8a4caa2f19aee5 SHA-256: 1a8e30c02c2892157113248b09371347bb4aa9f5ed21c9b3f20440c905c046ea
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs and the PDF structure suggest it is likely a phishing document, possibly attempting to lure users into downloading further malicious content or revealing sensitive information. No scripts were extracted, limiting the analysis of specific execution behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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/AG-UZpNbJGc/square?utm_term=electrical+objective+questions+pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3df583a33e4096de183ec/1626595160147/principles_of_physics_10th_edition_solutions_manual.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f14787b348e55d1c52af35/1626425223903/bizebozagabarojebokade.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec831f7726b430b46831ff/1626112799988/art_and_craft_shows_in_michigan_2021.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_off0000d1cd.bin
e7c84e386d6e065f9ae9ed8fe300cd818cb77f2f7f2c8802a1be150189c7e40b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CD 11176 bytes
font_01_sfnt_off0000eb97.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 16792 bytes
font_02_sfnt_off000103a9.bin
0a3bb70ea3be5c8dd84cb562dda1e0f9fe455afeb6cd3fa9fc78f651af6cbf07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A9 17484 bytes

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