Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f47ba2e5601f9f5…

MALICIOUS

PDF

69.2 KB Created: 2021-01-06 02:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b1c13e6eddc0774c452a90794153b9c9 SHA-1: e91b4abb1d951531102b1f0f69cbe46585389304 SHA-256: 6f47ba2e5601f9f5eac0116c18c775757df0b44a6e1d9a51d8daeefb163668a1
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links suggests an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=pour+over+will+probate In PDF document text
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5fc9d3c4b0aa7.pdfIn PDF document text
    • https://fopimakalegej.weebly.com/uploads/1/3/0/7/130738542/ba9d55d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486367/normal_5fac5f8a9c0a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5fd11c03a05d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459182/normal_5fcc93a116a0a.pdfIn PDF document text
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/9187876.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/satulibaren/aviary_image_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/wipare.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/nirawop.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/california_notary_jurat_form_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/big_ganga_channel.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/charge_sheet_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/33564273507.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/bootstrap_4_admin_template_2018_free.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_off0000d4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FB 4928 bytes
SHA-256: c2d69b01238bb5b305acb0b87ff9c8f927aa26445bf103741bc554372a84f8c3
font_01_sfnt_off0000e5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 10028 bytes
SHA-256: 76c7167382f63da97beefcc5fea4a31bd23381f7247680c3242cfc8731c8ce43

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