Malicious PDF — malware analysis report

Static analysis result for SHA-256 565e325d1ea2bd4f…

MALICIOUS

PDF

70.9 KB Created: 2021-02-26 08:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 03ef501a3bd8710d83a4dd6c1211bbea SHA-1: 63f45ab4b36b3769ac39486af1031b611df64504 SHA-256: 565e325d1ea2bd4f6c8903e7a4d74a9c36c95ad274dfe1360fcde5d41c1a1b3e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to a search result for 'lenovo t430 charger replacement'. This suggests a phishing or SEO-based lure to direct users to potentially malicious sites. The presence of a large number of external links, including a PDF link farm, and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. No scripts were extracted, but the PDF structure itself is used to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFNoValidXRef. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://bologen.ru/award?keyword=lenovo+t430+charger+replacement PDF link annotation
    • https://cdn.sqhk.co/zetobazox/cHhgijP/lejazapelisam.pdfIn PDF document text
    • http://dazakaguwaxe.22web.org/spectra_s1_plus_boiler_parts.pdfIn PDF document text
    • https://wovipoxutoluku.weebly.com/uploads/1/3/1/3/131383624/08f98ab78726.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://povovudajax.rf.gd/57884180174.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/similarities_between_abraham_lincoln_and_andrew_johnson.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/40695734986.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/coeliac_disease_guidelines_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/resusasasonero.pdfIn PDF document text
    • http://loxexezusus.rf.gd/bededodadinijigev.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/givapigav.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/drenagem_linftica_manual_pernas.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/ballad_of_serenity_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/bamboo_veneer_sheets_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/autodesk_bim_360_team.pdfIn 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_off0000e03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 5564 bytes
SHA-256: cadbbe06688fec5986f816568b59d508010afbc628372e0101cdcecb067b626c
font_01_sfnt_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 11032 bytes
SHA-256: d5cc8cb84b40832eece2f618f4d11e5537bdc71c6a1b3b8fc9815785d6fe3dd5