Malicious PDF — malware analysis report

Static analysis result for SHA-256 34bc5e8447edb22f…

MALICIOUS

PDF

39.6 KB Created: 2020-11-06 15:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a02a455403828c871e5c64b9fd7f9d23 SHA-1: b1c4dc12fdf7ef739a744bb750ee7144a119d09d SHA-256: 34bc5e8447edb22f321cce4fea43a565f72b4884b64c26ce10885485def996cb
154 Risk Score

Malware Insights

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

The sample is a PDF document flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it redirects to known malicious infrastructure. It impersonates the Facebook brand, suggesting a credential phishing attempt. The embedded URL `https://traffking.ru/strik?keyword=fr+john+riccardo+rosary+podcast` and the action link `https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/rukazo.pdf` are identified as key indicators of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/rukazo.pdf.
  • 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://traffking.ru/strik?keyword=fr+john+riccardo+rosary+podcast In PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/rukazo.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/wogiselaruto-nokage.pdfIn PDF document text
    • https://jibudodenip.weebly.com/uploads/1/3/4/3/134364722/6422616.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/dudurat/14966765434.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/gufejozimik.pdfIn PDF document text
    • https://jalekep.files.wordpress.com/2020/11/18491050671.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/65070410478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/affb4604-7105-42d2-b69f-565eea2fcc03/armas_silenciosas_para_guerras_tranquilas_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/99774392566.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_off00005a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8A 5260 bytes
SHA-256: b8c3ebcbba6d589a64cbabfb122fe534cd555b4f7371d26002d95d5a637d68ea
font_01_sfnt_off00006c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C79 10424 bytes
SHA-256: fa3d366d1a36dc0721d4ca12b2d307815e31f77d55caf8396aebfff5570d5774

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