Malicious PDF — malware analysis report

Static analysis result for SHA-256 300cdee40e1bed77…

MALICIOUS

PDF

66.9 KB Created: 2020-12-16 20:30:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7ffbb9548bb5988db1e224982647a1c0 SHA-1: 31b7663e7b53481a6334f7782148d0118c9835ce SHA-256: 300cdee40e1bed77d11080fd9eff764169d65bb83a54d68ab4d73e9735c43774
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=t+rex+car PDF link annotation
    • https://mipejefote.weebly.com/uploads/1/3/4/3/134356111/luxim_savejerake.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fc9872957867.pdfIn PDF document text
    • https://lobakazuperowe.weebly.com/uploads/1/3/4/3/134352895/ee8834a3.pdfIn PDF document text
    • https://xonedapu.weebly.com/uploads/1/3/4/6/134654428/tejirazobewubapiwud.pdfIn PDF document text
    • https://muzavixoro.weebly.com/uploads/1/3/4/6/134647253/2f867085.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/c3433ad8-eab1-4555-8c8e-63f6d71be52e/josofevinakovobifasujuri.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/yellow_rose_flower_hd_images_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5072ec14dfd36fe0c117c/t/5fcf28a6caa95a391e67f5f6/1607411878682/ruluxoratariz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf565018e72e5fdbceba15/1606374992763/bdo_harpoon_auto_fishing.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/form_serialize_ajax_post_php.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_off0000ce0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0A 4600 bytes
SHA-256: a736de15392b31b561aae00c77a041e209c71cf5fac862e2f7cf8ac05d46e131
font_01_sfnt_off0000ddbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBB 9964 bytes
SHA-256: 9e417a1e1d297ce7e4e9e2d0a628da978a54634adac18574d5c833afa07f4aaa

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