Malicious PDF — malware analysis report

Static analysis result for SHA-256 2830a5cc4647b7c8…

MALICIOUS

PDF

68.6 KB Created: 2021-07-13 23:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 453f9e8243d31a3c77c71c70dcc9d848 SHA-1: 6c95d7add7bdc671e792c6b150cea9325954e018 SHA-256: 2830a5cc4647b7c88947cc7dad06d7cd1f36b02955785979aee73a83eb166792
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded URL, even if labeled benign in this context, suggests an attempt to redirect the user. The PDF structure and embedded artifacts are consistent with a phishing lure or a document designed to exploit PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6030

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/~3/1LSSs5qy-i4/square?utm_term=st+mary+and+st+merkorious+coptic+church
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec857c700aa07a78952369/1626113404666/if_im_52_what_year_was_i_born.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7da047d3b385c94b59355/1625807364889/math_12_solutions.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede2d0a9d1f62037e331c3/1626202832932/vonegov.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e811724b964f05b84a3a09/1625821554729/simple_present_and_present_continuous_online_exercises.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_off0000afdd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDD 16792 bytes
font_01_sfnt_off0000c7f4.bin
42121f2347504f707c5605eb4e5d69191708997b9661aed27e510223392d61f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F4 11112 bytes
font_02_sfnt_off0000e1af.bin
464b4da40fec588c9a1355bd0e18a4907ed23ad743e189d5f0a730094c1ea114		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 14540 bytes

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