Malicious PDF — malware analysis report

Static analysis result for SHA-256 434ca77c21343ca1…

MALICIOUS

PDF

69.9 KB Created: 2021-01-17 03:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6044954e86c61c1c1310f1f5b5deaac5 SHA-1: 78c4d09c8e802eaaba4bacea9a9804038ce63965 SHA-256: 434ca77c21343ca1c00a20b4c6fdb5b466d2fd76ed0571f9e1d37a03f8df4396
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, including a link farm, suggests an attempt to redirect users to potentially harmful websites. ClamAV also detected it as Pdf.Phishing.Trojan, reinforcing the malicious classification. No scripts were extracted, but the structure and heuristics point towards a phishing or SEO spam campaign.

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://trafftec.ru/123?utm_term=women+of+the+otherworld+series PDF link annotation
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/puweluwavitaxaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481820/normal_5fc09fcee0b7b.pdfIn PDF document text
    • https://site-1167971.mozfiles.com/files/1167971/venn_diagram_worksheet_math.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/eCYiiES/86862913666.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/jefusuti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368230/normal_60003c247a9e9.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/cidhKhe/79663732884.pdfIn PDF document text
    • https://tagipuzato.weebly.com/uploads/1/3/0/7/130776724/wefigezim_lenedivosuvup_pukelevaxawitel_gebazitudaj.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/numubevapejaxo.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/nofoj.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/babetafaperaxov/gaxufigiditonirimesit.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/agilmente_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/noxibikujojekorobob.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/16543926136.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_off0000d497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD497 5044 bytes
SHA-256: e4592a0b65cef895b00613322a62bd8df917bac5242b1a7dcc7aa8f300ebfabc
font_01_sfnt_off0000e5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AA 11320 bytes
SHA-256: 457648942cff84fe24407f2962e90adbefc8d5d10eb8bdccb93df16e082f9457

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