Malicious PDF — malware analysis report

Static analysis result for SHA-256 906d47101c6ae82c…

MALICIOUS

PDF

82.5 KB Created: 2021-03-16 05:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 27e2eedbaf1857b5c8ccf00bc1b8fbce SHA-1: beba5333299663282704860c5297458fd3e9a98d SHA-256: 906d47101c6ae82c5cf5ac00033a12bea2ee04be2bdb55e62679fda22e545be0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, and the ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=circular+motion+study+guide+answers PDF link annotation
    • https://wejigewaja.weebly.com/uploads/1/3/5/4/135400860/wonovajonuzuzir-nivenonozir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393889/normal_60037d27745b2.pdfIn PDF document text
    • http://malespw.xyz/jurnal_tentang_bakteri_coliformbo8q8.pdfIn PDF document text
    • http://fastpysystem.online/dageni4jjjj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_6021c10404046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486983/normal_6022adb712eb3.pdfIn PDF document text
    • https://xowuxuwakewobi.weebly.com/uploads/1/3/4/8/134853014/rosetafenifusoloxaso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_6039aec627d60.pdfIn PDF document text
    • https://pakajifovajopif.weebly.com/uploads/1/3/1/6/131607230/xawalikutedeveluvux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452852/normal_5fec83b886fba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411701/normal_602fb08feb1de.pdfIn PDF document text
    • https://sarejazaxixosib.weebly.com/uploads/1/3/4/6/134633098/7375214.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386618/normal_5fe4d7bb78f03.pdfIn PDF document text
    • https://lemarowaverixax.weebly.com/uploads/1/3/4/3/134371099/d026b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_6020544668571.pdfIn PDF document text
    • https://kewisivi.weebly.com/uploads/1/3/2/6/132681156/87ed6eae.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/dalava/sample_agreement_format_between_two_parties.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/52925441555.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/honda_gx390_pressure_washer_pump_rebuild_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/fuxad.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/what_size_tires_are_on_a_2005_chevy_malibu.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_off000105f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F5 5356 bytes
SHA-256: 2047d5002addccd5f6424d7ca70b3295128986f7e4bfc4d21c3adaa5b44eafa9
font_01_sfnt_off00011825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11825 10776 bytes
SHA-256: af815c52129acc96c3b11ae922ef15ca2b391eec19c093d92fd0d1baa96974f8

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