Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f2b98b0824afed…

MALICIOUS

PDF

72.7 KB Created: 2020-12-28 09:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 756130da8c3507588715a974539c8190 SHA-1: 770cd2a63622af577b8e60834bf2956c7ccd641d SHA-256: f6f2b98b0824afede8862bab1643940a7cf869789565827ccd9b58a6fef07a78
254 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a link to known malicious redirector infrastructure and a lure related to payment redirection. The ML classifier strongly flagged this PDF, and ClamAV detected it as Pdf.Phishing.Trojan. The embedded links suggest an attempt to redirect users to malicious sites for phishing or malware delivery, aligning with a spearphishing attachment attack pattern.

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
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://traffmen.ru/aws?utm_term=virus+scanner+mobile+free In PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/9fa10aa3c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462035/normal_5fc907c2c3b21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486206/normal_5fc931c29ac2c.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/b382696157edc8e.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/lotibabakuj/bootstrap_4_form_builder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99536bc5-1b45-44f9-b3b9-64aea57be3d9/65993564563.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/edhesive_2._3_code_practice_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3029937-40be-46be-a628-79536948a79e/vitizafetari.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/zorupegumuwere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd994473-8852-426b-948f-22e50ccf4e8e/diabetes_care_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7947a3-a217-4041-a4a0-204f988dfea1/international_friendship_day_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1086430-ba81-4e2b-9ca7-0eb1cb76a147/queens_blade_ova_5_cattleya_eng.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_off0000dc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC48 5132 bytes
SHA-256: 6ca955f78dc10bf21289b7fb4795db295a04ef7e1ccd27ac6e2c70b420ea7f47
font_01_sfnt_off0000edaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 11856 bytes
SHA-256: a5cc2a5958ba31f819f664569a3ce647ae60a6e2c6a0a9c57dda57aca9f74719

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