Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7ab41ff21aa5db…

MALICIOUS

PDF

71.7 KB Created: 2020-11-22 16:26:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 37fded2ab1a38833600042d664dff53b SHA-1: 4fcd547ff9be46ad45582dd18381e03640fe8b81 SHA-256: 4f7ab41ff21aa5db427be7d6bd3ec5c39fb667e2bcfc492f38872b00ec7f2ef4
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file flagged by multiple heuristics as malicious, including a critical finding for brand-impersonation credential phishing targeting Amazon. It contains numerous external links, with one redirecting through a Weebly domain to a PDF, suggesting a phishing lure. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a phishing document designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/7748014.pdf.
  • 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://traffnew.ru/123?utm_term=brave+new+world+1984+comparison+chart PDF link annotation
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/7748014.pdfIn PDF document text
    • https://jotevugujuz.weebly.com/uploads/1/3/4/6/134675951/8588522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413966/normal_5faeff0549cfe.pdfIn PDF document text
    • https://bepewosub.weebly.com/uploads/1/3/4/4/134445398/votufipaz_gagasavukabesi.pdfIn PDF document text
    • https://divugukapo.weebly.com/uploads/1/3/4/7/134706398/jikuneju-pijef-xigabigigaza.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/dezujivavobez.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/xeroguru/kosuvisobipafusaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/pafosusaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e428c19-b460-4358-b16a-b4706579d0cf/93080565310.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/bissell_natural_sweep_how_to_empty.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/plato_geometry_b_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/mudawifixawudilulawu.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/88787757176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d22ec38-fad7-4f4b-8593-350e6cdfc680/piwerorapagegixo.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_off0000da34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 6004 bytes
SHA-256: 5e1e979fc38c4eb11bcfbe3555d2dc2d7c8af75e75caf11a8a368d42de598bd3
font_01_sfnt_off0000ee99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE99 10340 bytes
SHA-256: 148fa21b6f1629ed4d59a0be958870ba7a4e26814055f350e18a17eb4a4ced14

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