Malicious PDF — malware analysis report

Static analysis result for SHA-256 73106037ef7372ed…

MALICIOUS

PDF

64.5 KB Created: 2020-11-09 22:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e605d4bcd54f380928e764bd83314474 SHA-1: 2216edd8b7f3a23e1745e2d4f3cbf60468e09136 SHA-256: 73106037ef7372ed2eafab2cad0a0f2126f7046e4e36a6174c4ba8c89cd79a17
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. An external URI pointing to 'trafffe.ru' was extracted, which is highly suspicious. The document body, though heavily obfuscated, contains text related to a calendar, suggesting a lure to disguise the 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://trafffe.ru/123?keyword=1995+calendar+october PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5f9a18baa80e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_5f993e0111850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420586/normal_5f9e8c57f3e41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5f89a4e2383a8.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/fe4dfbb5-b2af-4d8e-8c72-2bbdc3b90a48/12432301780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c95ab950-8762-4c1a-a954-9238233e1851/zutob.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/93810414784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/888206b8-e14e-4947-ab47-45bfae09c0b3/glanzer_and_cunitz_1966_original_study.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8437ef9c-5065-4840-8e44-c3d764f553b2/52968874125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4292aea-c12b-47ef-ac93-16d6bc8adff4/86637350541.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/68670337703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aadb414-0810-4fe1-9a49-26451beedb04/puwejib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3f1150-6035-41f6-a698-6320cf3d4f33/viking_h10_nx_manual.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_off0000c0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DC 5132 bytes
SHA-256: a6525747d7f2c1789bca64b6e3fb1bb1488bc5a10c8a3dc0d90c7fef8264418d
font_01_sfnt_off0000d262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD262 10436 bytes
SHA-256: 0fdfc077b69f83c68cad663fe17160236f8f646247f9476ddf9b6bae8e6d0568

Open this report in the interactive analyzer, or submit your own file for analysis.