Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0abdecbc995ad50…

MALICIOUS

PDF

74.7 KB Created: 2021-01-12 08:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 76a1dcaf3e7850f93fff86a415efec97 SHA-1: 2aee1683b7f479305005d70d1804991f9f511de3 SHA-256: e0abdecbc995ad504409db48c9335f76355f41e728ee96ccd71e86bb2fe584d3
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external links, with a significant portion pointing to domains that appear to be part of a link farm designed for SEO manipulation. The primary external URI observed is 'https://trafftec.ru/123?utm_term=best+legal+nootropics+reddit', suggesting a potential phishing or spam lure.

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://trafftec.ru/123?utm_term=best+legal+nootropics+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f87642493896.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/x1ghhhi/zorevowijexene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5fa65954cabf6.pdfIn PDF document text
    • https://sekulawovow.weebly.com/uploads/1/3/4/5/134578441/493898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5fbb23fe194b1.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/bhaqjgK/jungle_boy_strain_names.pdfIn PDF document text
    • https://jasedulenenude.weebly.com/uploads/1/3/5/3/135328633/xedopekive_pepugimeje.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/tawovojo/outlook_default_email_format_html.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/android_one_phones_under_15000.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/special_segments_in_a_circle_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/83264360374.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/attorney_lien_form_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/33947179102.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_off0000e701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE701 5292 bytes
SHA-256: 57bcfcdd7504638cce88a51538e4432e581d337f439f5f4233fb1b863b47b25a
font_01_sfnt_off0000f90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 10916 bytes
SHA-256: 454a5bebf95438152bf80186c2582f07e66ecec2049fed4bec7409f79d65756d

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