Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7830ccd1f07e0fb…

MALICIOUS

PDF

66.0 KB Created: 2020-11-25 02:28:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 55ea0a82c7b2fd6de216729c25235a9d SHA-1: 1bb0fe317116ee5217f7648b4e2650522f3ccb30 SHA-256: c7830ccd1f07e0fb5ed5343b3826a62ebd68125677d79b357cb8db9f5f663431
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 website impersonating a tax appeal form, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI are indicative of a phishing lure, potentially leveraging embedded JavaScript for further malicious actions.

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/aws?utm_term=hmrc+corporation+tax+penalty+appeal+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490001/normal_5faf6f7064d3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463264/normal_5fad2ee422b56.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/8e35096d-e39a-428c-8296-48dec9acc6bf/weider_pro_3550_cable_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57900cdf-f3dd-4ab2-beec-45e57cf75338/craftsman_table_saw_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1099787f-6c6b-4d30-b43e-c27893d827de/8642365581.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/mcfarland_usa_movie_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/zenonia_3_apk_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/vaxakelivawagesuzigumoke.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/in_app_billing_android_library.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/streamlined_energy_and_carbon_reporting_criteria.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/56570910190.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/magic_items_from_eberron_dnd_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2165415-a22b-4f60-b230-b7583274fd78/suviv.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_off0000c68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68A 5112 bytes
SHA-256: 419913b3f5535128c596fe737b7a16659a6685ca4c9a0d74134d2b7685f545c3
font_01_sfnt_off0000d7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E8 10268 bytes
SHA-256: 78c8356fbadbf8acac1fb411c77eba11a5fc226a7e30eda19c56613881b8e032

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