Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f9e7a777829f0e…

MALICIOUS

PDF

73.5 KB Created: 2021-03-23 01:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 016b4f2dee3f842019baa3e0c7592dfa SHA-1: 30d2830d0a20f22291b96340f5099c5f598ca0eb SHA-256: 17f9e7a777829f0e0c47de6cba2c08d5918d8870c253b42511a25d4bdf062393
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM suggest the document is designed to drive traffic to external sites, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jumiwimov.ru/award?keyword=lista+de+exercicios+analise+combinatoria+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419849/normal_60445b5d591a4.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/8987053.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/guzovese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452381/normal_60522015bed6a.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/washington_football_team_logo_helmet.pdfIn PDF document text
    • https://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/ruvofariwowes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484994/normal_5fcfa2d72bfb6.pdfIn PDF document text
    • https://sukizasatesez.weebly.com/uploads/1/3/4/6/134686833/zudam-sesowobifeluzu-wirelezosof-gotolafon.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/xarojapi/famizutebavuvowunib.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/fbi_badge_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/nikon_f501_vs_f801.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/fender_twin_reverb_cabinet_for_sale.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/3652492629.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/94218155837.pdfIn PDF document text
    • http://lexamokoxerum.atwebpages.com/business_loan_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/the_huntress_dead_by_daylight_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_off0000dcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAB 5448 bytes
SHA-256: 28e3ab306494e756a7988526544bbd28396a73c2b1e48bf83a39ccfd77821cd2
font_01_sfnt_off0000ef27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF27 13128 bytes
SHA-256: 02f643210e8d3264e478261ccf8f61f4502992168d3fbda02f58bd283b4b0d16

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