Malicious PDF — malware analysis report

Static analysis result for SHA-256 a500d2ecf1faab18…

MALICIOUS

PDF

67.6 KB Created: 2020-11-18 15:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9b3e084ba80f075a9e458a45398b6b71 SHA-1: 900b96dba233e30bf8fbda31844446e3bd43c1f1 SHA-256: a500d2ecf1faab180f0d0882812245dc2b3cd212cdd6037da31b68de4ed3e52c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ggtraff.ru'. This URL is presented in the context of a 'clep chemistry study guide pdf', suggesting a phishing lure. The ML classifier and ClamAV detection further support the malicious nature of this document.

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://ggtraff.ru/123?utm_term=clep+chemistry+study+guide+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5faa87775bb4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5f92057d4e1a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f920cbae8f10.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/pusolefosex/megefu.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/34640895062.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/autodesk_revit_2016_families.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/lazodusesazedokimoralod.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/rukojakodumalavijejor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28abe37a-0a1d-4ab9-b128-1aef4d3da9c7/spp_conference_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/florida_family_law_practice_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/taroguke.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/48599271798.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_off0000cca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA0 5368 bytes
SHA-256: 4afdf4edae7c45d6a2789c8bf7bdbb24d6f0c0dee3182ba6a61977e47ee99e90
font_01_sfnt_off0000debe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBE 10348 bytes
SHA-256: d7a3363757a8d99d1f07d12a61e21c10e5581f480caa7ca34a08e75591cc4bf9