Malicious PDF — malware analysis report

Static analysis result for SHA-256 57df0f657517537c…

MALICIOUS

PDF

78.8 KB Created: 2020-12-25 20:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 680926eda3b3e38d3a2b0f7f73ab1a92 SHA-1: 91e28a4d467c28042134bd384108d6dcbb038fda SHA-256: 57df0f657517537cb7710086b033f0255bd59cca017000af189c54fd5ea001df
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely as part of a phishing campaign.

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/strik?utm_term=world+war+1+museum+washington+dc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447097/normal_5fa6558e59451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5fb5136422229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412195/normal_5fda56d0e3729.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/MpjagjC/super_mario_world_flash_unblocked_at_school.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407327/normal_5fb2acf701bd2.pdfIn PDF document text
    • https://cdn.sqhk.co/xojafimib/ggjyXhb/unb_fredericton_football.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_5fa779bf544f9.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/9335fda6-e017-462c-8379-e7e7090d7e72/52477316286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aff18c1e-3b82-47c0-8cb1-23177bf6a4ad/vodixokiwesibe.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/fetotuzefedagerat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2553d4e-def3-474f-8fd3-5b22e0fc362e/70693002790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5462e75-5c7f-442e-9771-24bbcdf99bfe/sapomikugirijudug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2146f1f4-2685-4629-a813-c7f995f07c22/klipsch_quintet_iii_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/486f73ba-5d6c-49d3-bb86-64d790bd741a/oraciones_coronilla_de_la_misericordia.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/32702842213.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/pujofelipeguzivanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e6c2fb-554a-40a9-bc7c-1609c7c384c6/ap_gov_study_guide_2019.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_off0000f76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76C 5508 bytes
SHA-256: 0292acb1712e92bb941c0b61c7b76b7f6e73c3a713123c0ac6303dcca45d43df
font_01_sfnt_off00010a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A18 10472 bytes
SHA-256: 0bfa47118062b3593d341b86a3f0b34e535ff51f05e6072d9e8dd9b6b2d63a19

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