Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e5f23bb8e1ae4d…

MALICIOUS

PDF

69.6 KB Created: 2020-12-18 18:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 978fa15c82b71f0e1229c2b120042300 SHA-1: 901626ba7cadd6df6e922f047f5c25d8ed3035d0 SHA-256: f9e5f23bb8e1ae4d0713e8204e99bcd63d485106194af29d4d73569428e8d435
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/strik?utm_term=open+pdf+in+indesign PDF link annotation
    • https://vabejodero.weebly.com/uploads/1/3/4/3/134378136/8197c4a64c1a.pdfIn PDF document text
    • https://judikudaxu.weebly.com/uploads/1/3/4/8/134878276/709118186e3e2c.pdfIn PDF document text
    • https://fabedajigunud.weebly.com/uploads/1/3/4/4/134480588/15bd8a1a5b5e5.pdfIn PDF document text
    • https://nidabiweni.weebly.com/uploads/1/3/4/8/134865500/pawofof.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/4f772abdd0dd8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc11b4016f6d44b07c000b4/t/5fc2e3ab08845d0924e991e7/1606607806657/sakuxojodabowusabitof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57202b8467722f1f27178/t/5fd6708e96ed101a3e429605/1607889038805/dijumegivujizuger.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/59867971044.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/aashto_design_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/gapexironoropi.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/airmen_online_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/tanipovojabavibab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10620bf71053ccb10dd13/t/5fc2cc1fbc819f1cf43514a5/1606601761138/35105980152.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/at_t_uverse_outage_report.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_off0000d5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AE 4896 bytes
SHA-256: 19b853252022f43dd1f0609310f09e4edc6552b737828803d0ab1f8cc847e08c
font_01_sfnt_off0000e676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE676 10472 bytes
SHA-256: 7f19779fb5a6347676ec6eca0d6cadd7e089ab729958ff6e63d9bc8be074c9c0

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