Malicious PDF — malware analysis report

Static analysis result for SHA-256 7147d9a7551435d5…

MALICIOUS

PDF

72.0 KB Created: 2020-12-11 15:54:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5497ba4d1858be2392aa387a5f00b329 SHA-1: 041f387af7a77c170e55a6f96ac583426526b7b4 SHA-256: 7147d9a7551435d5c04f7675fcd2090f741e4be490de743b33b7f5fbd0e937ff
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to a suspicious domain. The PDF structure and embedded artifacts suggest it is designed to exploit vulnerabilities or trick users into visiting a malicious site. No scripts were extracted, but the presence of an external URI is a strong indicator 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://traffset.ru/strik?utm_term=rainbow+unicorn+attack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499329/normal_5fc33b89cbc49.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/f28c93b6-51ea-4fc9-b618-f1c3c6a3e6a5/pf_flyers_mens_size_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc88293-5a48-4423-873c-e6a4ed4331e9/xekuzujibuwekomemisebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb92cd69-499e-4de8-9374-d2bb082c2c93/mefusawidaxasejinazusuvep.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/aba_state_meeting.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/fevizerurojidasitu.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/95564141489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a847bf-81b8-4f69-a6f7-d0f0a8d582cc/funapifoluxusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e705e4f9-76f5-468d-bbed-2eba269e080f/delta_gamma_sorority_anchor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a243e0a-2832-4ff2-8508-0d0b2fbeb013/limites_trigonometricos_ejercicios_r.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56dfd7f1-3b28-40b5-81e2-dde306732596/5th_grade_math_word_problems_workboo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e7e24e4-aa99-4f5d-bc01-f45f391136d0/modaga.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/82212100015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfdba9a6-7a52-4f7c-abf6-7b57f12cd1b6/5553210132.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_off0000d115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD115 4652 bytes
SHA-256: 7f254023223b1ec47d5f794f402ada6569e996b23df2d1f5ecbde69ba4453168
font_01_sfnt_off0000e101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE101 10540 bytes
SHA-256: 9bb11151327898b47f2592d28006d586557335a5d241b41efca5047da5bdbb2b
font_02_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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