Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7313bd6258abd2f…

MALICIOUS

PDF

77.0 KB Created: 2020-12-30 04:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f675c149c635b5088d18a6018342f768 SHA-1: 74d7da68d988303cb6af8a3c7d13bf482daf225c SHA-256: a7313bd6258abd2f639d3c422b7cb2964abbfb5c4a3921c81b27a753cc809319
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, trafffi.ru, which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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/123?utm_term=fuel+supply+agreement+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fd7ddf4012ae.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/be9e673f-6758-412f-90e6-0b41cfacda7d/power_cooker_plus_canning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83ef213-9b99-4c0e-b8ac-463a5ea4c4be/kutaluxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aadb414-0810-4fe1-9a49-26451beedb04/puwejib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce120e34-c395-47fa-9976-26acd4c34f39/exo_members_ages_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84384e93-24a5-4cbc-99f2-24beec7c9ee3/dojorusak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/014d4724-a173-4218-949f-95ca42dd6bd0/how_to_write_a_romance_novel_outline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e09122-e384-4488-bb77-8b3cafe70f03/41401862717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efc4f586-49f9-498f-b68b-de428ce86562/96798202918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/220e756b-fb4d-4c58-a8f1-8e8916e6a6d3/beyonce_hello_lyrics_video_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/815ca6e7-030c-4a44-9767-b6892089c581/roswell_that_ends_well_imdb.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/98395465438.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_off0000edbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBF 5420 bytes
SHA-256: 7ff656fabfcdd7308f2a2c59d223dee58d97116d41baa9f4e65df0d9bed9da6f
font_01_sfnt_off00010025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10025 11720 bytes
SHA-256: 6c163287cafdff7bb499295e8996a06de3ab478c66a274221c6e51e3693775fc