Malicious PDF — malware analysis report

Static analysis result for SHA-256 e892437ba9658179…

MALICIOUS

PDF

71.4 KB Created: 2021-02-16 09:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 278dc5dd5c3586d38216734821dfeede SHA-1: 250fea432b8bd5dcbab1a3fdb3af0b4100fca50f SHA-256: e892437ba9658179302016788fc8264dfda6e9ef43cc44781dd77f9642cacfaa
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to text analysis, likely to trick users into clicking the malicious link.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=analyse+the+structure+of+a+text+examples+description In PDF document text
    • http://3gusevshop.space/acer_aspire_5315_wifi_driverm8gf4.pdfIn PDF document text
    • http://pasendapp.online/13807777132z2wpv.pdfIn PDF document text
    • http://kdghy.online/548528992309kbxb.pdfIn PDF document text
    • http://dazefoxezizu.iblogger.org/change_ho_gaya_punjabi_song.pdfIn PDF document text
    • http://it50disconto.info/lamborghini_song_video_pagalworldwalcq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416149/normal_6015ffdcb2cfd.pdfIn PDF document text
    • http://glawerry.online/agencias_y_sucursalesv18mw.pdfIn PDF document text
    • http://makamar.tech/wordscapes_level_8235qegnt.pdfIn PDF document text
    • http://vikorurapufor.iblogger.org/1080p_video_converter_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/bulalowisu/37292597079.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/93722211657.pdfIn PDF document text
    • http://jedirolin.rf.gd/42421219751.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/lumafusion_2._0_user_guide.pdfIn PDF document text
    • http://dejunividote.rf.gd/dasix.pdfIn PDF document text
    • http://mofububozej.rf.gd/16989184711.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/renal_artery_aneurysm_guidelines.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_off0000d94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94F 5556 bytes
SHA-256: 1dc2a1e47736883a75e80ef159623ec1b440879e9d5df4b724e9538f3d095e3d
font_01_sfnt_off0000ec18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC18 10616 bytes
SHA-256: 74d0c7cda11ad3ce09641038a474434f1aeaa6b741c2e8b74095c582b8eebbd9

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