Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c116de44c4d716…

MALICIOUS

PDF

72.9 KB Created: 2021-03-01 22:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 04aff58ba5ab01ef1ba8add88548c0ff SHA-1: e55d4cd6fd573dc81dedd213fbc2c6506cd0e033 SHA-256: 51c116de44c4d71634deab49118bd3903066a7578741ca07ae7667a37aca1086
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, including a known malicious redirector, suggesting it's part of a link farm designed to distribute malware or conduct phishing. The document body, though heavily obfuscated, references 'periodic table of elements blanket', which is likely a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=periodic+table+of+elements+blanket In PDF document text
    • https://bodumiwi.weebly.com/uploads/1/3/1/4/131406735/bagakolixadudebepuf.pdfIn PDF document text
    • https://cdn.sqhk.co/nugunexinazo/XYmgcgf/41732309484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487382/normal_6032f7cade304.pdfIn PDF document text
    • https://fetevemukimagon.weebly.com/uploads/1/3/4/8/134896640/6819560.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/jc6PUid/xegakowakafal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375528/normal_5ffc7f4a71eeb.pdfIn PDF document text
    • https://jurozujuzofu.weebly.com/uploads/1/3/4/8/134875655/1957169.pdfIn PDF document text
    • https://zefojakafi.weebly.com/uploads/1/3/0/7/130776787/8292aad3681f2.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/lazolu/kijobajanu.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/facebook_videos_android.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/geographic_concept_map_projections_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/30282931809.pdfIn PDF document text
    • http://bosurigazo.epizy.com/rexovuvozakigenogabeg.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_off0000e064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE064 5372 bytes
SHA-256: 07a4ad942ec4ee3bd881a87be184990251cee3e5e507996a7bd40a0dcc7518d9
font_01_sfnt_off0000f294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF294 10800 bytes
SHA-256: 174a1a30cbca606d9e272bb0170ff7525d934b40efbafe82b69985532c72f5d3

Open this report in the interactive analyzer, or submit your own file for analysis.