Malicious PDF — malware analysis report

Static analysis result for SHA-256 359ff5f8ca47d0f5…

MALICIOUS

PDF

70.9 KB Created: 2020-12-27 16:11:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5bea8181e0cfb55332b54298d1b34ae0 SHA-1: d605cb8b2b0058be0caf7e69a5a47b8dc331b678 SHA-256: 359ff5f8ca47d0f5586f1bd81fda5ec51813de24c71317ab549fb499ad86ab15
214 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The document body, though partially corrupted, suggests a lure related to an 'artwork approval form template', aligning with phishing or social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/aws?utm_term=artwork+approval+form+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_5fa92745d1774.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383128/normal_5fcf865b7e75c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_5fb9903a79418.pdfIn PDF document text
    • https://tefifegewa.weebly.com/uploads/1/3/4/3/134335978/4503652.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobobowu/ach_credit_authorization_form_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f4f3c9-6c64-4c97-bf62-f0f3b073444e/gunujaduwivivajatasesobo.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/rimumamuliruxuluka.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/sheet_pile_cofferdam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/780e1a74-c91c-42c8-848f-9c1543216ea1/collin_county_mugshots_towel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb3aa5f-1c3b-4ca8-85e9-107d75b20403/63046260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc87949c-e9c9-4830-8e31-12c81b5a3736/354410128.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/graduation_card_announcement_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5319185f-a544-4242-9a3e-03add8117689/40800835845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d829f2b-cf6c-400f-ad6e-10df02e9bb9a/myth_spells_wizard101.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/jepodanes.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_off0000d893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD893 5072 bytes
SHA-256: ba3a7f87c1765252403fe18f4d962871ff4994f47b4fc4962fee226e786dcdbc
font_01_sfnt_off0000e9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E4 10704 bytes
SHA-256: 4dc849ddf74b45a5786a7180cb3615e01ed27bc1ce6c0188e1da06a9f5133bbf

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