Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fc1414f8c7a724…

MALICIOUS

PDF

65.7 KB Created: 2020-12-18 03:23:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 827bcdf7e4d4110bdcb2a63d68f586bc SHA-1: 26fd4ffe2de7b7dca325fdc3dc691470b61c46f8 SHA-256: 95fc1414f8c7a7246e9f6335ac5a70a999d39c28e1df07dd62f361b3975d214d
214 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with several pointing to known malicious redirectors or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were extracted, the presence of numerous external links suggests an attempt to lure users to compromised or malicious websites.

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://ggtraff.ru/123?utm_term=delta+shopmaster+band+saw+parts In PDF document text
    • https://nutiduvurenomal.weebly.com/uploads/1/3/4/6/134681926/9121100.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/767975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378618/normal_5fbf389a2eee4.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/fujadabez/91109004679.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/tezarowepe.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/celestia_ludenberg_cosplay_aliexpress.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c5fa405d5340f34b1f29/t/5fd6d374491a58544a228b37/1607914359716/animal_kingdom_worksheets_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/car_sales_contract.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/aiims_delhi_exam_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/next_greater_element.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/gikujowazigitesefinudit.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/51285697796.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/ball_bounce_free_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/dish_tv_remote_programming_guide.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_off0000c338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC338 5432 bytes
SHA-256: f50dd5c4feac13860360fc557fc6895ea0d8c88c74fb644605119db1cbcd81fa
font_01_sfnt_off0000d591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD591 10664 bytes
SHA-256: ad93046f7043f0256fcd32148f65ba9e7acbe5622a866aa8842162d92970e112

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