Malicious PDF — malware analysis report

Static analysis result for SHA-256 66945d96058ea288…

MALICIOUS

PDF

75.5 KB Created: 2020-12-21 20:42:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bfb0fc6029afb25f525b67f80e3644b0 SHA-1: d57f9783fd6d11e1861b150198922d2057865939 SHA-256: 66945d96058ea288db5f3363e2f8a40d378483d8e9eca845b9cc5c0615aad2f6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to social media engagement, likely to direct users to the malicious site for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of malicious intent.

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://trafffi.ru/strik?utm_term=how+to+get+followers+on+instagram+business+page PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5fd7cef07c27c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f9d2b437fc84.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/99e075bd-6c23-414b-9667-a2159a7bbab2/17514159618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa706b32-c016-4c16-a145-8f09a1a572be/yukari_persona_3_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236a0c15-7541-421d-8b47-560ef2f11c21/janesville_youth_baseball_schedule.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5166417e7202640051625/t/5fca3ef4be6684539df5979b/1607089908943/mutual_friend_finder_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eeb8b74-ba42-46c0-beb6-ab4490f83106/principal_entry_plan_checklist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d1ae56-b029-4c26-8bd2-193f1b665fe1/gufuredexutizo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce6ba8564f736a5832ea25/t/5fd5f617313c42342b81cc95/1607857688375/agenda_meeting_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f63242-b91b-4744-a642-f86da8f8c3e9/43135718221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a576ee46-c340-4835-ba43-2917abc74330/10838784185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88cd3945-77cd-40d9-be14-1959ba479ee0/3817827416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ec6265-296a-4bf8-811f-d94c156c63e2/dietrich_von_choltitz_family.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_off0000e827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 5416 bytes
SHA-256: 4595a35b500dac32f2a41b73cd72952c2a2bb1130cbda4a8cafde68e31024c7b
font_01_sfnt_off0000fa92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA92 11288 bytes
SHA-256: c38547e7727ca2e9c95132bf9bd802ec31e66ced9d6da3c714438548854af7a8

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