Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5fbaafbce9c26c…

MALICIOUS

PDF

76.9 KB Created: 2021-02-12 01:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d34d7ee96c541f0359f2790c12535244 SHA-1: 1c205242c7221e2e2b4c3684d63c1067729238f3 SHA-256: da5fbaafbce9c26cb56a9d9a4d8dfa633b95d34a2714fdaf98c7789aa9392118
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, directing users to various websites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content or phishing pages.

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://jacksth.ru/wix?keyword=crusaders+of+light+leveling+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475562/normal_5ffd81db55674.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/duburedaven_dupakawugotar_gabesezip.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/iiqLgfo/suwopuna.pdfIn PDF document text
    • https://cdn.sqhk.co/dapubebireba/igwjbgj/redemption_switch_hop_colors.pdfIn PDF document text
    • https://cdn.sqhk.co/dexediwiboze/ifijhae/missile_defense_advocacy_alliance.pdfIn PDF document text
    • https://xororawezajeber.weebly.com/uploads/1/3/5/3/135338150/rojidofelafa.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/kovezodepugov/xubodulutipipowidejekidab.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/45152110082.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/searching_movie_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/install_aptoide_apk_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/physical_therapy_description_template.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/ayyappan_child_songs_tamil_starmusiq.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_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 5136 bytes
SHA-256: 6a38c5016e9d59c0f221c7ce1e5626d5a7598110822473547d371b6e30b691b7
font_01_sfnt_off0001037e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037E 10260 bytes
SHA-256: da9a71276736ef71a364753a17262d4870b87a19e916d45fd350d5a49feb92e6

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