Malicious PDF — malware analysis report

Static analysis result for SHA-256 c73e66a24849afac…

MALICIOUS

PDF

65.9 KB Created: 2020-11-17 10:21:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ae4f9ca4e57f52898771931b9a79e5fb SHA-1: caa635dae9a6ca917a0b36e381ef94a46c34747f SHA-256: c73e66a24849afaca11dd6fd404a0496e9d6bdba2acc7715ada28d2a7d8a47a3
234 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's content and structure are designed to trick users into clicking these links, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/123?utm_term=ccna+wendell+odom+pdf+download In PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/9752e3beb.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/4235858.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/4841e2c74.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/gumagabu/diwevulijoxegaguwagobokow.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/kubaxaluwosujavabozawok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117bcb20-0f22-47da-8c2a-b17950152072/rapoboteli.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/59490914980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22527141-1f80-4f88-af3c-d1563b6887fc/gevojufufix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/459d3324-634d-4c79-b34d-f0f0f7a05dd4/lullaby_of_birdland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fce2db7-46cf-4651-a37b-3cba5fce4560/ejemplo_de_delimitacion_de_un_proyecto.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/61547477967.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/47079652541.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_off0000c561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC561 5024 bytes
SHA-256: b0b75ba083e5a157c77a830d986e54c3df7a66380c677acd47a3b5754ecceb95
font_01_sfnt_off0000d67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67F 10656 bytes
SHA-256: fa4b545a84bdc6529c569ff84d1b2a6b8e2f7ef4b0d0e47ee23b44661685069e

Open this report in the interactive analyzer, or submit your own file for analysis.