Malicious PDF — malware analysis report

Static analysis result for SHA-256 701185b34b5138ff…

MALICIOUS

PDF

89.5 KB Created: 2021-07-17 01:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59a74fc29468b4ca2027413ce1cbe08c SHA-1: e86367a07a60195c22692be41ff71eedcc702257 SHA-256: 701185b34b5138ffe7f5e2f4574a7704fe24b3755037323a40a8ab6e89e67879
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests a potential phishing or credential harvesting attempt. The PDF structure and the wkhtmltopdf authoring application are consistent with malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8380

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/CcIy6vlvkUk/square?utm_term=ielts+speaking+topic+relationship
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1cc91978db22e891dbc88/1626459281965/daradedipitebinujeg.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0afd44af6cf0f37879fef/1626386388993/cautious_and_conscious.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee51a5114e6b7b7de83719/1626231205810/25219471547.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e776da1bd7543d7b5beca3/1625781979063/4878612670.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93a11b132fa36207454c5/1625897490456/fail_to_authenticate_from_external_provider_pubg_2020.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_off0000f2c3.bin
4c48b15111ad6e252859b3af026f2298946a06f962b70286614050e387e4f440		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 24124 bytes
font_01_sfnt_off000127ce.bin
6f1a39387e66e52cc57c1762ad07a7f3e18a55b783602e408488570f6e3a9293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127CE 10696 bytes
font_02_sfnt_off0001404d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1404D 16792 bytes

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