Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc6ee8efa232a67…

MALICIOUS

PDF

71.0 KB Created: 2020-12-26 17:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2fd954a1603f69e506dbdb2dcbae8a30 SHA-1: dd23dfcdb9fae9bb10c4af3ab45a22135f90c716 SHA-256: 5bc6ee8efa232a6728a89e41c09ee1e125679021b9b6d70e76631cf1ea8b8a31
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farm or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/aws?utm_term=arreglos+en+java+pdf PDF link annotation
    • https://sekulawovow.weebly.com/uploads/1/3/4/5/134578441/493898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486213/normal_5fa8efe420edd.pdfIn PDF document text
    • https://morekifozolil.weebly.com/uploads/1/3/4/3/134332894/f0be4d26137f.pdfIn PDF document text
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/dilizorapojosanoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5fd2f68295829.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/mupukesunobaga/gojifijolurelaru.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/compound_and_complex_sentence_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7297e1fc-a468-4f18-b1bb-bcd48de2757f/fipanegil.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/jarusixujef.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/43513731527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4003936-d544-4931-9a06-02a3df9312bd/roladevovigusubejivokajem.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_off0000d786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD786 5336 bytes
SHA-256: 31a7d1a6108e7dc6243d803ea9fbe9b9d53165a3b9e6606ca02beb243620c40d
font_01_sfnt_off0000e9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CA 11712 bytes
SHA-256: d92a181cc4737e3c2be3d13ce6b4c1bbcaab67e088d488ad9339d28faab33184

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