Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0ae2fa1a4768ad…

MALICIOUS

PDF

65.9 KB Created: 2020-12-26 22:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c41968cc79b1dbb74f97db6b92e84cdf SHA-1: 8260ae0abf1751ff7bb420684e397eef948376e3 SHA-256: 4a0ae2fa1a4768ad12006514cda9abcc8264e2928e8b7dc6d4a2c57f4338d704
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link to known malicious infrastructure and a link farm designed for SEO manipulation. The embedded URLs suggest an attempt to direct users to potentially harmful websites, likely for phishing or scam purposes. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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/strik?utm_term=miniature+golf+in+montrose+colorado In PDF document text
    • https://cdn.sqhk.co/moviferu/fEjjIhi/tiny_house_builder_colorado_springs.pdfIn PDF document text
    • https://relowuforobelo.weebly.com/uploads/1/3/4/5/134528439/danufasafuji.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/2COMict/27632693975.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/godudewo.pdfIn PDF document text
    • https://dotomogef.weebly.com/uploads/1/3/4/7/134760479/f8cf88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ac0c28-6b6d-465a-8a62-f55d72d3ffca/libros_para_aprender_japones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf36000-5f95-426b-8e9f-9aae3188f6da/ribofatog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e002c4-cb84-4b90-96e6-21572de752c9/conquer_your_critical_inner_voice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd225815-26f4-4568-90e8-cb9a0360ab78/analisis_foda_de_una_clinica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c3f19f-c986-4de3-a2fc-949a89d29083/pesesadewerurajofiwobugup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a8afb0d-9c0f-41ca-a1e2-f525830b968f/lucky_patcher_apk_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503c263b-63ed-4d52-b3c0-85c8a71ac1a0/kilokoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b849fbb-0430-45e4-994e-16e0763d67d1/26869293011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a95b966e-19ef-43f4-b57a-5c827f8e9c22/thats_no_moon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f21a696-502f-4644-b20e-01eaefd277dd/94341362121.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_off0000c6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C3 5344 bytes
SHA-256: 7d4868196f6a5bd1732ac002a7ab2dbec57a0d439fbde56336778460f93bc37c
font_01_sfnt_off0000d8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EA 9884 bytes
SHA-256: 1b132c68a735b0bca11970bb5261ba38cd972e9f59e7488cbef6b0c3d8d485e6

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