Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa55f6dc23bdd7f…

MALICIOUS

PDF

67.0 KB Created: 2020-11-24 14:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2a581f04a5c0007b3a95992e90bbb48c SHA-1: f85a7df987741361bc04be31530e397a7fa1dde5 SHA-256: 8fa55f6dc23bdd7fd905aa6c2e723e8003bb884df60a4cc2446cd791f2e14126
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of a malicious URL and the nature of the PDF heuristics point towards a phishing lure designed to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=classical+conversations+memory+master In PDF document text
    • https://varivupe.weebly.com/uploads/1/3/4/4/134480773/boridofusesog.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/6bdc51ef0f177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418567/normal_5fb3d45820b13.pdfIn PDF document text
    • https://raxuzorufureraw.weebly.com/uploads/1/3/0/7/130775378/dufapojupivo_gixunesolaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5f8b4e4895f08.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/tetofamuxulil/kaneohe_elementary_school_doe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cecaedd8-19c3-48c0-a4db-3d4013dfc890/free_download_3d_max_2009_software_full_version_with_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0e0fae-c6ef-4f39-8d83-b702551bb09f/champion_compressor_vr5-8_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/77811439844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221de91a-eb2b-4fd8-8c75-456f2766399b/wojolasizenoxux.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/70381912004.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_off0000c82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82F 5012 bytes
SHA-256: a7c689577c650bab188dbc605c33df39d2e35d4c9b2263a7e762654b325a0426
font_01_sfnt_off0000d92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92C 11124 bytes
SHA-256: 53c1edfb8b831146b4cbfa968516f0483f49ea5efac20ee129aae99d8cf3a5ee