Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9cc1a59f84880d…

MALICIOUS

PDF

70.1 KB Created: 2021-01-09 18:18:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d2705b98dfe18bc3aae094579b421c90 SHA-1: 64c3dcd8c3e0bb23a46a715e69122fd0b456f555 SHA-256: bd9cc1a59f84880d4555d31b67047c34a4d012579736ca8a47ec4d2810d14db5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though obfuscated, contains text related to a 'Confidential statement on fax cover sheet', which is likely a lure to encourage user interaction with the embedded malicious links.

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://traffset.ru/aws?utm_term=confidential+statement+on+fax+cover+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365555/normal_5fdea4cf061df.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/wadabuji-dagurunel-vetajoxurag.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/6113389.pdfIn PDF document text
    • https://sorozodosunew.weebly.com/uploads/1/3/1/3/131381031/tarovirujosalereki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_5fe434ee9291a.pdfIn PDF document text
    • https://fiwazapabuw.weebly.com/uploads/1/3/4/3/134357015/gimupomisubid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490722/normal_5fb252c301995.pdfIn PDF document text
    • https://zuduwejigorim.weebly.com/uploads/1/3/5/3/135329148/rafekirelaravivefoto.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/sigobija/dead_by_daylight_game.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/34400627083.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/78684328522.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/nizaxomogaja.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/65790967608.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/diary_of_a_wimpy_kid_the_deep_end.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_off0000d6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CF 5296 bytes
SHA-256: 847e412a419a4b68aca97067809ff5660b79b0eea091250ab113b84607598fdf
font_01_sfnt_off0000e8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AD 10048 bytes
SHA-256: 3823ad62ed64df058596671089bbb77e1a762f17870b2180aa1cc3e2cf625cd1

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