Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c4d2ece6d61a0e…

MALICIOUS

PDF

68.0 KB Created: 2021-03-02 20:48:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e825f87f6821f51be3b8ffb7881b0c65 SHA-1: a63c9be21b36f0bc88c0665c0253c7afdac44b07 SHA-256: 57c4d2ece6d61a0ebc4c67eda182f50592d3210163b429c66926254da676a69c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on dynamic DNS services or file-sharing platforms, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the structure of the PDF point towards an attempt to redirect users to malicious sites for further exploitation.

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://jottigo.ru/wix?keyword=beckett+price+guide+basketball PDF link annotation
    • https://panasijizikefiz.weebly.com/uploads/1/3/4/4/134446590/1656076.pdfIn PDF document text
    • https://bonuxomudod.weebly.com/uploads/1/3/2/8/132814593/zujuliwonomeg.pdfIn PDF document text
    • https://nezasofesaz.weebly.com/uploads/1/3/5/9/135961661/7960377.pdfIn PDF document text
    • http://meetcabinets.xyz/kisijositalltkn.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/briggs_and_stratton_yard_machine_lawn_mower_wont_start.pdfIn PDF document text
    • https://gosasolana.weebly.com/uploads/1/3/4/5/134523876/pimitibexi.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/by_the_waters_of_babylon_theme.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/zopelopafira.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/3e2e77.pdfIn PDF document text
    • https://wilukogata.weebly.com/uploads/1/3/5/3/135388132/64caf5b.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/wifiduxezo/molecular_orbital_theory_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/semajimadaziludezivaja.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/21699866251.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/31642767106.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_off0000cd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5C 5496 bytes
SHA-256: 1cabffd37c0d19c22ed401f1ba99e5510406f8ff756759ed66e442256a4b782b
font_01_sfnt_off0000e015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE015 10368 bytes
SHA-256: 14f90cd78ca30862193c5cf28228ba04c39872f59acd097599df2f000f5a62f6

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