Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c6a27f928aa8ff…

MALICIOUS

PDF

67.0 KB Created: 2021-03-03 03:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c01a112cfe6f2b5f018fda1d77bee4d3 SHA-1: abb77642a3b7d7a744c6cf85ff8b895e9d9998f9 SHA-256: 90c6a27f928aa8ff2dfe8a4c097b8f9454d4c038af4ce470f3ff4edc8667ce4f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO poisoning or phishing attacks to drive traffic to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external links, with one pointing to 'https://lozipotod.ru/123?utm_term=avaya+one-x+communicator+agent+login'. While no scripts were explicitly extracted, the presence of PDF-specific heuristics and the ML classifier's high confidence score suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/123?utm_term=avaya+one-x+communicator+agent+login PDF link annotation
    • https://wofexajolevesi.weebly.com/uploads/1/3/5/3/135302186/sidakukag.pdfIn PDF document text
    • https://gilaxaled.weebly.com/uploads/1/3/1/4/131438091/tazapelet-sapoluzuzuzi-merapukar.pdfIn PDF document text
    • https://mojapilujo.weebly.com/uploads/1/3/0/9/130969316/fakidupofutezane.pdfIn PDF document text
    • http://xejitifuwoligaf.mypressonline.com/jibatazimitebozonipim.pdfIn PDF document text
    • https://cdn.sqhk.co/faruzikako/Fejihb6/ximav.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/xojafemori/43426626878.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/mathrubhumi_calendar_2018_june.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/83436276579.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/80743596393.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/school_newspaper_template.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/60098060882.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/47166062959.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/3610692723.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/72765242905.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/dulofowuzukufogasuguroto.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_off0000ca2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2E 5192 bytes
SHA-256: 7c45621f3a2914dae4772a9b079eacd74448fd15e1c244304d739afafa005c9d
font_01_sfnt_off0000dbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDE 10424 bytes
SHA-256: 9e83cf804253c2a55edfafc19b50fd25a2ac50340e59b5cdb8e90bf0e764fa59

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