Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7870368dffb2a1…

MALICIOUS

PDF

77.8 KB Created: 2021-07-21 02:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b681b085f4ea0dac68d37cbf7af38dc SHA-1: 93248e3afb26463b2fe61a15e41ab91f9d2965c3 SHA-256: 5e7870368dffb2a1d5e6091d95f678f594c874f455d7a8cfcafa4261c2f03b83
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'philabc.ru', which is likely part of a phishing attempt to trick users into visiting a malicious site. No scripts were extracted, but the presence of the malicious URL and the detection signatures strongly indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://philabc.ru/square?utm_term=distance+time+graph+average+speed
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f617add18f246b0cec7ab0/1626740654131/a_mere_human.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca8537d354a5e86a673a8/1626122323854/social_studies_words_that_start_with_y.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e79cd0ba333063f174b64e/1625791697158/calculating_the_long_side_of_a_triangle.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4d3956f491d4a1f026d42/1626657685801/supply_chain_organizational_structure.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f59acee5e55f16cee09215/1626708687169/tupexiluw.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f4e976e13ee976661ac543/1626663286902/here_and_ther.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7767a52db4a70f0fde666/1625781882141/design_thinking_and_project_management.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3a30ec5d9e6782ce53a6f/1626579726937/discovery_rule_statute_of_limitations.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0e3f5425b7b7417821ca7/1626399733601/muxaxisijugakadedemopani.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_off0000cdf1.bin
c2da7061c700574e6aac03b01199f08437dd53596bdec6f1d87667f8c349d6e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF1 17040 bytes
font_01_sfnt_off0000fa73.bin
d8a408b9a2d2d8f1e21a1e763fb32f3082f917430cbca03ff6caed96a53905b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 10860 bytes
font_02_sfnt_off0001132f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1132F 16792 bytes

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