Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd50d59b9af1df6…

MALICIOUS

PDF

74.1 KB Created: 2021-02-28 19:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 9391033d433b0436e993ac7f666fae3b SHA-1: 59578b4754d378d5a00c676950f6598f7a45f5b6 SHA-256: 9bd50d59b9af1df609acf7f0b08da16f737a00e22ed74e7c2bf4163c84ce9506
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 'golowaki.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'Toshiba satellite l755 service manual'. No scripts were extracted, but the presence of external URIs and the malware classification strongly indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=toshiba+satellite+l755+service+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366371/normal_5fcc9499a76df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419849/normal_601c61a097a41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419452/normal_601e109f5b919.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/75415979438h38jo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462374/normal_5fe33dfd602dd.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/gchbhfo/53215886086.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/jifkjbf/85036538783.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/cjfWZLU/dead_target_offline_zombie_shooter_game_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bagokiko/jimogenoforufodewozepi.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/burnishing_sheet_metal.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/jensen_vx7020a_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/nafiwufupotimatijuv.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/planetfall_campaign_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56A 5392 bytes
SHA-256: e7e00e25cc974f7dc892c337f347c61be1bacb48b35256f6db50f7179186a7be
font_01_sfnt_off0000f7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A9 10336 bytes
SHA-256: c3c00f9f6263e6dd01fcb457b00215fc4606cf1634bd7141d093b6e22a564662