Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abcc5016c574e1e…

MALICIOUS

PDF

73.3 KB Created: 2021-02-07 13:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 53d523c7f3a720b3b52bfa123e1c0ccd SHA-1: 4dff3e91e2091df27457697e316a233606414caf SHA-256: 4abcc5016c574e1edc457bfff48c8889b4d9e5c3482c1263dea2a25e36fdc7fa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, often initiated via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/aws?utm_term=answering+wh+questions+speech+therapy PDF link annotation
    • https://cdn.sqhk.co/takejirasomu/iehgaia/1_universe_love_quotes.pdfIn PDF document text
    • https://wilegefozuf.weebly.com/uploads/1/3/4/3/134399327/pomufunu.pdfIn PDF document text
    • http://legejuwarowu.22web.org/addressing_modes_of_8086_microprocessor_datasheet.pdfIn PDF document text
    • https://zoseduzarososu.weebly.com/uploads/1/3/2/7/132740870/2543648.pdfIn PDF document text
    • http://tonorubur.22web.org/b_tech_ece_syllabus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484115/normal_5fd1fb367b011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416664/normal_600f8ccf9d085.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387933/normal_5ff542328ea94.pdfIn PDF document text
    • https://pofubelepegeva.weebly.com/uploads/1/3/0/7/130776421/7333651.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/xijuxosisomuna/dodagulenisop.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/73839673772.pdfIn PDF document text
    • http://nuxizutize.rf.gd/top_movie_sites_illegal.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_off0000dfcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCB 5472 bytes
SHA-256: 0cee01e016982252162822213cd6f5387dab80a199c2a7c73e3553424cba1727
font_01_sfnt_off0000f27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27C 10612 bytes
SHA-256: 9aa932a2a2a881afc2bc5f803b9472da82233e01968e611904af7c0b35c2f2a7

Open this report in the interactive analyzer, or submit your own file for analysis.