Malicious PDF — malware analysis report

Static analysis result for SHA-256 2682c6ff5f9be8c4…

MALICIOUS

PDF

76.4 KB Created: 2020-11-22 06:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6be55cc268e5698c64c1422921b4ce41 SHA-1: 006a59193b948df5b1e18cd54e90f0e0e53b6f28 SHA-256: 2682c6ff5f9be8c4986761b080ea154e1f6fe618e6f5c8ffa203e8061f0a1d0d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL, https://traffnew.ru/123?utm_term=stygian+sherrilyn+kenyon+pdf+espa%25C3%25B1ol, likely serves as a lure to a phishing or malware distribution site, disguised by the document's content which appears to be a search result for a book. No scripts were extracted, but the PDF structure itself facilitated the inclusion of the malicious URI.

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
  • 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/123?utm_term=stygian+sherrilyn+kenyon+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f8a781c5bd1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417045/normal_5fb9dff4bece2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5fa5a0f1883a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5f88aa2e64426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479675/normal_5fab8f461ce1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_5fb308b5edf37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460682/normal_5fb9cbf0cd739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5fad9d833ea05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8e37f459362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f8a59cd389c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b1923a26-2b7e-4707-b3ce-fcc5cc031329/9238987641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de4b3d87-83b1-4578-9e40-1f527fb378d4/spy_school_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5142aa2f-63eb-47f1-b2d7-5e33fd23efb5/v_belt_measurements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5aa0142-0e12-4776-b29e-2f4c3883a21b/destiny_2_leviathan_spire_of_stars_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed755b78-909e-46bf-992f-24e1763ddafe/lore_friendly_fallout_4_weapon_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da6443c6-a1b3-4bb3-adf2-d6029c323e63/45530542295.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 5572 bytes
SHA-256: ec889476020fa8fa36e7dc288461939f3b934634cb6b9083bc6183d80809f227
font_01_sfnt_off0000ee4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4A 11604 bytes
SHA-256: 4fc668ab0d3ae0640b001416ff7249be52d019e8c5c7ae7ee516ba8d81930f14
font_02_sfnt_off0001146a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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