Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3e9222200072fd…

MALICIOUS

PDF

69.2 KB Created: 2021-01-24 08:33:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4d7bfeb8e0b55d30e6e42887799e7ebe SHA-1: 198cb537b595f2767cd2cebd28bb330b4c54821a SHA-256: da3e9222200072fde4aa34182dbcba428871ba7653f2dead3bcada3d78978b31
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. The document body, though heavily obfuscated, contains keywords related to membership fees, used as a lure.

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://trafffi.ru/123?utm_term=fort+worth+boat+club+membership+fees PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482858/normal_60058306686b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365540/normal_5feb26ab9a110.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/mokuwixemet.pdfIn PDF document text
    • https://site-1177706.mozfiles.com/files/1177706/video_editing_application.pdfIn PDF document text
    • http://nufurimuler.iblogger.org/botas_negras_plataforma_pull_and_bear.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419828/normal_5fd9081476227.pdfIn PDF document text
    • https://site-1247665.mozfiles.com/files/1247665/rs3_dungeoneering_guide_mode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458625/normal_5ffd9aeabb971.pdfIn PDF document text
    • https://site-1179282.mozfiles.com/files/1179282/bennett_bolt_trim_tab_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393628/normal_5fcfa4f7613f4.pdfIn PDF document text
    • https://site-1179658.mozfiles.com/files/1179658/laxefe.pdfIn PDF document text
    • https://site-1234635.mozfiles.com/files/1234635/talonro_geffenia_farming_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mojilobopage.rf.gd/genomestudio_sample_sheet_template.pdfIn PDF document text
    • http://zapudeni.epizy.com/24303344377.pdfIn PDF document text
    • http://femejedad.epizy.com/73873600321.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_off0000d15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15E 5440 bytes
SHA-256: b5b7bb700cbf0227858e2d11262fce9b6d0dede4807b052c45f0701640d6e097
font_01_sfnt_off0000e3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C7 10492 bytes
SHA-256: c1e3ddbc59589c9246310aa92f218bd51c3c6dc9ef45381233ded35c1eacdeef

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