Malicious PDF — malware analysis report

Static analysis result for SHA-256 74eaa15029fbba70…

MALICIOUS

PDF

62.0 KB Created: 2020-11-18 00:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 19030606d3fa9798e104d479d8497870 SHA-1: d6c8fb13d634012e3323152b1b12210ddba8ea94 SHA-256: 74eaa15029fbba703a387b1e395924fe621e54130ea0de85b80386cbc03d2e54
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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://traffking.ru/strik?utm_term=cahier+d%2527+%25C3%25A9criture+dumont+pdf PDF link annotation
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/gunipidame_bevub_kutesodop.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/5188742.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/97be2998-e1d0-46c9-ba07-7e427e5c1f05/blessed_be_the_lord_god_almighty_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d1b29f0-d6d3-4b8c-9e20-624c58bbafb8/common_core_question_stems_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf0b40f-88cf-44b0-913c-d7d6978ebe03/62633793861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47558e99-99b7-447e-a78b-90a850f3cc66/vlc_blu_ray_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a240f621-bfc8-4260-8676-9f0aa071c849/buzudiwuvuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1614024d-916d-4dc1-8276-34758b099b93/psoriasis_kuuroord_nederland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d987924-aef0-4396-80ed-cbb1105bbcb3/21956783127.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/capitalism_without_capital_jonathan_haskel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b6d1f1-3425-4867-9723-8ae6ae47c7a4/69748014943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800b92e6-cbd0-4503-977c-73e409a83c13/marvel_guardians_of_the_galaxy_123_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b492192-07b8-41d5-b892-a0b95a24051e/8461917559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f2fd12-beb8-48e7-962b-46e22961fe03/32915680888.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_off0000b4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E4 5264 bytes
SHA-256: 7f5622ea12d7b63b96d6c7efd7b5b9b726ca30e332547a02c2f90460f0a0e86f
font_01_sfnt_off0000c660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC660 10928 bytes
SHA-256: b436ca0f5b42f3d446cb8fa24632a2d140ff6438bc4f2233160f0cb03e700c3f

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