Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bee3d6e78626d4…

MALICIOUS

PDF

58.4 KB Created: 2020-12-24 12:33:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9542d1ab63d8182eb5590a6b651f2d1f SHA-1: 7e25a9e2264026c9be95c1139dffd279b96e344a SHA-256: 80bee3d6e78626d4b513563298c91c5182b8ca4d3d932eeb0b15cd6e03679270
154 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to a suspicious domain, likely serving as a lure or a distribution point for further malicious activity. No scripts were extracted, but the PDF structure and malicious URL indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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.
  • 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://traffine.ru/aws?utm_term=agrobacterium+transformation+freeze+thaw+method In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5f993fe019326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f9b7b3d8e8dd.pdfIn PDF document text
    • https://cdn.sqhk.co/gisanewat/aigf8uS/90389527758.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/viwoxuz/poxifudis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52e4bbf8-4949-42c4-8748-7f882bb7b89e/os_fs_70_surpass_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/factors_affecting_fetal_growth_and_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17f39fa5-d2f8-4777-a9ef-49f928da91b9/reliable_property_services_racine_wi.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/39681497368.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/zagaxop.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/multiplying_polynomials_worksheet.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_off0000a8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B7 5676 bytes
SHA-256: ac6e40e464dbffcab2819343afc3352426acd8cf43ea45db7cbaa0e5a0b3e127
font_01_sfnt_off0000bbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF6 9788 bytes
SHA-256: 0194e9af692e6a3959921d63d58e803e3f9706a19364d054b433cb121ae66791