Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fd9aa74279900b…

MALICIOUS

PDF

67.4 KB Created: 2020-11-25 01:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e2beb80dc81c52fbb7675cc01bc06755 SHA-1: 8ba46b226b0cd9c2f7c95f779b14042d43312413 SHA-256: 60fd9aa74279900b45d1653aae4865b41c69a4dff2a674225aef946669d80f29
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in phishing or SEO link farm attacks. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external links, suggesting a malicious intent to redirect users. While no scripts were explicitly extracted, the presence of external URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?utm_term=birds+sound+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5fa19fc331d36.pdfIn PDF document text
    • https://gidujinogojavu.weebly.com/uploads/1/3/4/0/134096303/dafovoka.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/farurunomeliwif.pdfIn PDF document text
    • https://sudesiresa.weebly.com/uploads/1/3/4/8/134881981/ee4aa68eb5abae6.pdfIn PDF document text
    • https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/jovakagimuxotom.pdfIn PDF document text
    • https://luzolujimus.weebly.com/uploads/1/3/4/5/134505858/dcd984c1ce3.pdfIn PDF document text
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/wukezisopew.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/zurovajij/email_acknowledgement_of_receipt_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/scarlet_letter_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/34186020607.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/acta_constitutiva_de_una_sociedad_cooperativa_mexicana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8dc8aa-7791-4e41-8191-e2124f4dc6ec/patufifoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7b1bd5-66af-479d-8205-e2b19bce5580/55607248503.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_off0000cec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC6 4688 bytes
SHA-256: 2a01b6832e1d94810447a3aa20ad9a96cfca7894b64b5895b023d8890ce6cbbf
font_01_sfnt_off0000decc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECC 10052 bytes
SHA-256: f64faf5da32068e1a8350d2dc94f57ed850051e826d2826ebde3a2fd821cc0f2

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