Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e3a4f20fa26fe9…

MALICIOUS

PDF

70.2 KB Created: 2021-02-22 17:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 748e0095f007040bbf1dde574230f22e SHA-1: f11648bc2d84076b9af0a9a23d446dacee42a1d1 SHA-256: c7e3a4f20fa26fe9cec8e9cc009ea7f56ce72c4488d9e809932f9d2211376565
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to PDFs, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains text related to 'Capital markets real estate meaning', likely a lure to disguise the malicious nature of the file. No scripts were extracted, but the PDF structure and numerous external URLs strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://maypoin.ru/123?utm_term=capital+markets+real+estate+meaning PDF link annotation
    • https://cdn.sqhk.co/xajimujigaju/fiaC4zd/jugisafuno.pdfIn PDF document text
    • http://rabota-plus.club/mijopuneweligikakikotiego3v.pdfIn PDF document text
    • http://dusosax.66ghz.com/habanera_sheet_music_voice.pdfIn PDF document text
    • https://xarudaxukisa.weebly.com/uploads/1/3/4/0/134018653/5f96fe612025.pdfIn PDF document text
    • https://kesetemokeze.weebly.com/uploads/1/3/2/6/132682820/kixituwonamolutexum.pdfIn PDF document text
    • https://sarisakela.weebly.com/uploads/1/3/5/3/135308925/3621c982bff.pdfIn PDF document text
    • http://situbune.iblogger.org/pituxupowinokudonupufon.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/4146631.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/vavabi/20220920547.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/rujogatadenolabijowobe.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/kapimafipixutumazi.pdfIn PDF document text
    • http://numivonef.rf.gd/kylie_rae_harris_crash_toxicology_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/broken_angel_male_version_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/2254763571.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_off0000d63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63E 5108 bytes
SHA-256: 8d8692b4d067b044545f2eebf7c587607df311178fab0e7e6c1888a1fbab7b46
font_01_sfnt_off0000e784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE784 10604 bytes
SHA-256: 1cca63d3238159dc31e667ec82468686b7a6b51272f0681e288bfbb8ec70c05b

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