Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d715b2a4a604f2…

MALICIOUS

PDF

65.8 KB Created: 2020-12-15 16:14:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e044d1801291b4463b29ddec41aced83 SHA-1: 9283b0878a56f8881c906f398f66150a39955372 SHA-256: 64d715b2a4a604f2c0bef0b865d1b48cb3d3b641cca56f5214d12129c95d1c65
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to 28 external PDFs. The ML classifier and ClamAV detection strongly indicate maliciousness. The primary malicious URL identified is traffnew.ru, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=fevicol+sr+998+data+sheet PDF link annotation
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/zawepeben-wewisula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459794/normal_5fc034a837f69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5fd67778da789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5f9946fcd806a.pdfIn PDF document text
    • https://gejosabuvin.weebly.com/uploads/1/3/4/4/134457948/6710661.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/f39dd97c-294f-4af6-9623-2ddcc97c3052/xamoduwejam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1e879f-a6cb-4ed8-8bae-ddce6dfcaa9f/qy7_pairing_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f399baf9-5852-4b7e-8877-431f57c51cec/center_daily_times_state_college_pa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1caede3-b95e-4047-8b00-547cf7bc77ce/stubhub_or_ticketmaster.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b6af6879d031da13cbf8/t/5fd1d3bd5e090321cab47ae7/1607586752622/mulobetonerepakapijoza.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e5b8a3bf4b14aba92f9c/t/5fc12e194e98326c023aad59/1606495771337/gamexokanejaveregig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce83c4f-e515-401c-9c6d-314fffbcab15/12.4_similarity_in_right_triangles_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b96206c-1471-41b3-941c-e74db7e2058f/47366046523.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/nimezesujatesabovuf.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_off0000bf48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF48 5392 bytes
SHA-256: 66a0b75d28da1d08a42f4711a86391c9048544c74c927acbffd8cc5b5b96bb39
font_01_sfnt_off0000d19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19F 11868 bytes
SHA-256: e79c810fc441f6170aed54c2878ae716504f37eee823d17bbc9c4e3a9e08d410

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