Malicious PDF — malware analysis report

Static analysis result for SHA-256 3095aadd819f922a…

MALICIOUS

PDF

84.3 KB Created: 2020-11-19 07:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 92f8435256eab882bb5a793ac953f601 SHA-1: 7cea89154e1328e7a1bc52f17b224835631818fc SHA-256: 3095aadd819f922ae0963bb639143e119664f6043fdb620273393c0e52e7aa70
194 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector, specifically designed for phishing lures. It links to a known malicious URL, suggesting an attempt to trick users into downloading further malware or visiting a phishing site. The ML classifier and ClamAV detection strongly support its malicious nature.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/123?utm_term=quest+flat+fold+wagon+weight+capacity In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f8f1a06d736b.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/2cd1b0a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_5fa2609549d2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419425/normal_5f995e09902a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f95c521d6377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f964c1cec0b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5fa9cc796e98f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5fad6847be953.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87bd7c0a-7e4c-4cf0-9751-9d233c5cf8eb/principles_of_macroeconomics_7th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/safety_training_for_swim_coaches_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84e439c-a58f-42e8-a665-8775f5842b07/tefugoniduvor.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_off00010b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 5576 bytes
SHA-256: 91da9de12fde71892d28a46dbb758110f3b0ec6cc420388c9b02d57fadd6c5e7
font_01_sfnt_off00011e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E19 11204 bytes
SHA-256: 9afd0da92625b8c4568c1eb548d190a001524acbdd5f3f5864cbca3e66d75006