Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45f838aa1b8f949…

MALICIOUS

PDF

68.7 KB Created: 2020-11-21 01:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: eced96ec5de14d54e20ce50405d2888a SHA-1: 0a65c88ff7a61852f03221eef084c11cdb3e082a SHA-256: e45f838aa1b8f949f3e41e1505fe7727c5ff232982f730b9151906268d6e526c
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one prominent link directing to 'trafffe.ru', suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious sites.

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://trafffe.ru/123?utm_term=flights+to+shreveport+from+orlando PDF link annotation
    • https://jinugavov.weebly.com/uploads/1/3/4/4/134438703/dujujabubet.pdfIn PDF document text
    • https://jadimakadafi.weebly.com/uploads/1/3/4/3/134378671/ccdb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389097/normal_5f9f85d728f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_5fa79c71b82ed.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/62e33ee20e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f8d40c86c270.pdfIn PDF document text
    • https://kepoxenuranejes.weebly.com/uploads/1/3/4/3/134396716/4763599.pdfIn PDF document text
    • https://mefevujeloz.weebly.com/uploads/1/3/4/3/134317202/kuvarevesotab.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/takeju/bdo_chenga_tome_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/joy_mangano_steamer.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/academic_writing_skills_cambridge_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/xidawemilenofip.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/premiere_pro_2019_version.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/potential_guide_maplestory.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/meiosis_activity_worksheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB96D 5468 bytes
SHA-256: 9175600e96f4fd17d2ce33c94273fdb384d6235b39777e084938e87ace34fe67
font_01_sfnt_off0000cbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE6 10644 bytes
SHA-256: f288cb77e32ca4c78d403c57031246dcd99218ae49d67efccee46006026f95bb
font_02_sfnt_off0000f06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06B 16180 bytes
SHA-256: 24f18d28bc599d08c080d6abcdbad549237be7a96a675e4d55206636f0820ad5

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