Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47a10bbf44778c9…

MALICIOUS

PDF

68.7 KB Created: 2020-11-24 14:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 766644144fd6ed385a6d8144555cc3d9 SHA-1: 395182a6831905e6bbddac9cefaff742b3664d87 SHA-256: e47a10bbf44778c9b3b0df31fb321495adfd5b169d7d5085efea6d1f6c920f24
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is detected by ClamAV as a phishing trojan. It contains numerous embedded URLs, including one pointing to a known malicious redirector. The document body, though obfuscated, suggests a lure related to search results, likely to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://gettraff.ru/aws?utm_term=history+of+swedish+language+pdf In PDF document text
    • https://pinonomobeberex.weebly.com/uploads/1/3/4/3/134318871/zibipamevo-gemiv.pdfIn PDF document text
    • https://mivijupa.weebly.com/uploads/1/3/4/5/134578330/6234366.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/rexijanuduwepudu.pdfIn PDF document text
    • https://xemivigezeb.weebly.com/uploads/1/3/4/4/134481563/tizeroki.pdfIn PDF document text
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/46197.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/0933f.pdfIn PDF document text
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/navixejigip.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/liguwubore/windows_7_oem_activator.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/the_odyssey_anticipation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/62096876963.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/1699999181.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/laripozupil.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/weather_report_for_cedar_falls_iowa.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_off0000cd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7B 5456 bytes
SHA-256: 0d5c0cc8c70c624a4696dae621116bf3ec07f8f12368831d465ee72027e387a1
font_01_sfnt_off0000e021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE021 11640 bytes
SHA-256: 86e0e92aa33a9b8213671584fa471262bd0ef0b80215056f0ec4c7dd8690b1c0

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