Malicious PDF — malware analysis report

Static analysis result for SHA-256 19699ca0fad41a1c…

MALICIOUS

PDF

398.6 KB Created: 2020-11-14 20:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9e5aee8daa766a910c1a3a1b90f34232 SHA-1: ef1a057bc0474057fa831ff3ffe6e859e2fd54c8 SHA-256: 19699ca0fad41a1ce03345935f8df6d4eeb497d19dc47d83b121aa60e0f865b7
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure and a brand impersonation lure for UPS credentials. The ML classifier also assigned a high probability of maliciousness. The embedded URLs and the document's metadata suggest it is part of a credential phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9754

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
  • 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://sulewana.weebly.com/uploads/1/3/4/6/134605909/nugobaxodolaxakobinu.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://cctraff.ru/123?utm_term=dnv+rules+for+fishing+vessels In PDF document text
    • https://sulewana.weebly.com/uploads/1/3/4/6/134605909/nugobaxodolaxakobinu.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
    • https://kobigaxa.weebly.com/uploads/1/3/3/9/133997295/gujedawuje.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/a2735e31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426261/normal_5fafbeb923c3b.pdfIn PDF document text
    • https://pixijitawe.weebly.com/uploads/1/3/4/5/134593468/dafarilidilagukexuwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393638/normal_5f8f5bd218465.pdfIn PDF document text
    • https://wajajudamivigo.weebly.com/uploads/1/3/4/3/134359543/ruworaramej.pdfIn PDF document text
    • https://letitunonagafi.weebly.com/uploads/1/3/4/4/134494227/3440429.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/fatisake/pneumonia_treatment_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/anemia_de_celulas_falciformes_fisiopatologia.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_off0005f20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F20F 4876 bytes
SHA-256: 79a1a0c1dcc40bdb1084adfe5f4fd5fea15e81d06fa107010ec4edf673c25e4b
font_01_sfnt_off000602b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602B7 12420 bytes
SHA-256: 1b21ff253b88447dc4f94d5c2a15f0578da19b5f7c7852c50d98d831ab33eb9d

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