Malicious PDF — malware analysis report

Static analysis result for SHA-256 27589b27e13556c8…

MALICIOUS

PDF

73.2 KB Created: 2020-12-26 09:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b3d20b5f8b95824d7933df3e633c6dc1 SHA-1: e93f9b91eeb1f6093f42b08b27c57c9dae46b5ca SHA-256: 27589b27e13556c804cc3a0c765bc6a3d0908e9f29b213435c16df0c5d4541e4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for phishing or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffine.ru/aws?utm_term=alluvial+soil+images In PDF document text
    • https://cdn.sqhk.co/barugogip/kQjfhia/83284042240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480579/normal_5fc8d503bbc72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5fa0f54b01f14.pdfIn PDF document text
    • https://direfuxapiw.weebly.com/uploads/1/3/4/3/134371974/30a5eda6d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489583/normal_5fe1c163391e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5fa11875bd6c8.pdfIn PDF document text
    • https://nubojubixuxo.weebly.com/uploads/1/3/1/4/131410311/kesukalunugegeku.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/3e3f1725-1528-4eda-a230-dc9623b892f7/12585028704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9544a27-2b5a-4e1b-9e8b-5eb57a2e65c9/nabiboruduwozom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/241c127a-e8e5-4ca2-b63f-830fd7d8fd59/58111788879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a43e746-6caa-4391-a23e-f33374960d38/sukofevuri.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/82285551514.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_off0000e095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE095 4960 bytes
SHA-256: 490d370cbda1e1d64a4459edbf9bde0154c01f7299e08d61317b6d11ab838a71
font_01_sfnt_off0000f16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 11872 bytes
SHA-256: 1a1b910ae5855aea60e980680aa82a38aecf88a87c79bdc39db512ef3347c3ec

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