Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b5f6063b2b79ea…

MALICIOUS

PDF

64.5 KB Created: 2020-12-16 18:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f8d6289a4956aba723cebd9e53499c31 SHA-1: 3e2ea2c8c2564af1d36fce45440cbc9fd72a690e SHA-256: 44b5f6063b2b79eaae2fa29a949abddc572160faef03905269f22d747201e9c3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/123?utm_term=what+is+a+hemisphere'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffking.ru/123?utm_term=what+is+a+hemisphere In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369663/normal_5fc99604baa54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421782/normal_5fb778daa65d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_5fd6e7633957e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f9001f65a405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_5fae3c758b827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416653/normal_5fca4678a9fd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_5f91874d92e99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7a8f348c1673e559e38e9/t/5fd6d04689566e781f5fcfbb/1607913544220/44667185576.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5278c0a2757459bfe8d1c/t/5fc98481e4017829c1606bc1/1607042180203/photography_studio_equipment_prices.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58ea3084698658e7deaef/t/5fcf49c864290b1c3dd426ff/1607420361020/zagawabu.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/getting_to_know_the_periodic_table_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/zufuguzilaguto.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/vans_stacked_platform_sk8-_hi_and_era.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/weninajojexiji.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_off0000c239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC239 5040 bytes
SHA-256: bdc4b9e0a3cf3cd1e80012eebad5238ea78137a26587f64a0b9d732facf8624e
font_01_sfnt_off0000d33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33A 10132 bytes
SHA-256: 53d10724070b55329fd6fc0f9f51830e2b36f25d513422555dc0ec152429ae70

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