Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a2a7b1f62c37d8…

MALICIOUS

PDF

72.6 KB Created: 2020-12-13 20:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 392b19332c001e5ec4ce466263d24d00 SHA-1: bb584259da0ae6ed32efef2b41f4c3e7316495ed SHA-256: c3a2a7b1f62c37d8a7cd056de3fecdb30c4d5869e1c215f0b7d14ecffb787a88
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=logitech+z+5500+setup PDF link annotation
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/pilabolosusijag-gizizeg-kopufobosagimid-rufuzitopadedoj.pdfIn PDF document text
    • https://rovorakule.weebly.com/uploads/1/3/4/7/134774255/9351787.pdfIn PDF document text
    • https://zipalusub.weebly.com/uploads/1/3/4/3/134343211/fc736e2a2034.pdfIn PDF document text
    • https://roriwemako.weebly.com/uploads/1/3/4/5/134599113/d34bbc9e.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/7efaaae4c9f.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/susopuzupure/tibemasikazunogafanal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc67dbe405d5340f3503ee8/t/5fc9747819890c408b1ff6d6/1607038072910/xuboferafoxe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d7ac403f5353fd956fc5/t/5fc146a861e25426e1673b7d/1606502057837/ricardo_arjona_canciones_para_dedicar.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/good_manufacturing_practice_gmp_guidelines_inspection_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/muniwadobe.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/91203626871.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/63582106627.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a839be9b69395132fc47/t/5fcc9e082bc7884852afd5f1/1607245321873/kitchen_fever_pizza_chef_joe.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_off0000de26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 5116 bytes
SHA-256: 7076cb117aca28bb77c784d51c4490d272adef25ce3fb1d0d1eb1acf6a585d2f
font_01_sfnt_off0000efaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAA 11396 bytes
SHA-256: 031eeb52030379fef95253100a1f9844f8e94a39cfb59fcedb39520d8bdad192

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