Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9c3b9e9135fbda…

MALICIOUS

PDF

63.3 KB Created: 2020-12-22 13:28:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0b5a02413397dbeb90a5b31eb824aeee SHA-1: 92b0c592150004f6221ad0e7e4a5806841c480b3 SHA-256: 7a9c3b9e9135fbdaa196fb33b7b6cdaf716bc1ce91dbd2a08caf2ca0eb068bd6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URL that mimics a search result for a specific query, likely to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect the user to a malicious site, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=sarasota+county+clerk+of+court+phone+number PDF link annotation
    • https://vijosiza.weebly.com/uploads/1/3/4/7/134746498/zulus-samejizomulakaz-xidemusofapi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381752/normal_5fcb636384aac.pdfIn PDF document text
    • https://ferugagesavisux.weebly.com/uploads/1/3/4/6/134687542/9841262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470014/normal_5fb9a2376bb5a.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/857488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387808/normal_5fa6448ec8586.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/92296874-ab78-4304-93b2-b969b3fc0de7/tanigosebofimobavoseboka.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/tuponakegawezugeduzax.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/37569106409.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_off0000bb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB03 5664 bytes
SHA-256: 6c79fb916550b321baccde0b0ea88b5c33992fcfc723b02f02116237a33a4704
font_01_sfnt_off0000ce25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE25 10076 bytes
SHA-256: 03712c633a3aa3028c4ac47359461f7abe8d64c1b93707d36a5595e11884174d

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