Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62bf9ea725c0980…

MALICIOUS

PDF

75.1 KB Created: 2020-11-13 01:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e844d37985269ae95d1cfa8ab99d8283 SHA-1: 7c14ab54a6fa123fb7d8fdf74de9aeb11f9462c7 SHA-256: c62bf9ea725c09803064ef132986f4b28d3e52473eb42c4256d0641c627bc571
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to other PDFs, suggesting a link farm or distribution network. The primary URL, 'https://traffset.ru/strik?utm_term=conan+the+destroyer+full+movie', is presented as a lure for a movie, which is a common tactic for phishing or malware delivery. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan distribution.

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/strik?utm_term=conan+the+destroyer+full+movie PDF link annotation
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/440e9b52fb1.pdfIn PDF document text
    • https://likixulojuxe.weebly.com/uploads/1/3/4/3/134386003/peviwiwese.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/ffb5f8d2.pdfIn PDF document text
    • https://bedakowunuva.weebly.com/uploads/1/3/4/3/134342711/mejiridesog.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/lulelepese/mogovute.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/vomamanide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/rugited.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/91861682202.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/fapiveruwido.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/65212618207.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/68903048501.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/lopenofuvozitarezoxefuj.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/big_data_analytics_and_data_science.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/the_bugs_bunny_and_tweety_show_1988.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_off0000e72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72C 5212 bytes
SHA-256: df7b636490cd7aa12bed765d9300ff6c81c4f90440783822845bbf9348416124
font_01_sfnt_off0000f8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C3 11404 bytes
SHA-256: feb80e3cf15f5f83127bb3e65181d9814d887888853c66d0bfe05d482442f7ee

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