Malicious PDF — malware analysis report

Static analysis result for SHA-256 52191ce5c07d30a8…

MALICIOUS

PDF

66.9 KB Created: 2020-11-25 21:26:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6bb03e099ba34b992b6d7c7b6ef6ed85 SHA-1: 8bb3f9f117e253c4f7981da67157d5d3100ef180 SHA-256: 52191ce5c07d30a890b2d2be5f45716302cdc1d97486ebd407a28ecdd5407114
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, and it impersonates American Express to phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the redirection and the phishing lure suggest it's designed to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ribimefisele.weebly.com/uploads/1/3/4/5/134516567/1229cee1.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/123?utm_term=d%2526d+warlock+patrons In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5faec82844cf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f88625804e09.pdfIn PDF document text
    • https://ribimefisele.weebly.com/uploads/1/3/4/5/134516567/1229cee1.pdfIn PDF document text
    • https://belafawejogawol.weebly.com/uploads/1/3/4/5/134583754/jakadaworulozazur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453556/normal_5fb39f63638c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e8369891-464d-4f2a-af08-473a3411aa4b/55549413600.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/bauordnung_nrw_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/92735910368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16387e1d-45cb-44a1-8aca-5ccee3786bf2/57806710096.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/76962232017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db69dba-0f7c-4db0-bc6f-adc9429d6d9f/tomeguwe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30E 3484 bytes
SHA-256: 865832ca46ee1aac596e2af09c34c3d6059d9ba0f9f4eea226865a594599e1c6
font_01_sfnt_off0000ce7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7B 10296 bytes
SHA-256: 6e1c6a20fcc1dd0be4a5fc3bc9dbafeb167178e95781d7c7fc6b6913789fea07
font_02_sfnt_off0000f1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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