Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92ce28091680471…

MALICIOUS

PDF

82.1 KB Created: 2021-01-11 04:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2c169e003a71f02358676921239f7baa SHA-1: e8db8c46c9c3f01cb48c0d87b92ff39a0cd5a5e5 SHA-256: e92ce2809168047156b509b09a918ee8429444d07dcb960e1c884eac4259e174
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of embedded links, including a known malicious redirector, and is structured as a link farm. The primary attack pattern involves directing users to external, potentially harmful websites.

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
  • 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://traffmen.ru/123?utm_term=que+es+un+autorretrato+literario In PDF document text
    • https://wipedevibenisi.weebly.com/uploads/1/3/5/3/135315865/liwekepudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5f8b318f69719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475212/normal_5fb8c7032c30a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485166/normal_5fe0cbfbc551f.pdfIn PDF document text
    • https://site-1193591.mozfiles.com/files/1193591/real_piano_app_download_for_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411219/normal_5ff41ba975366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_5f9766ee6aa16.pdfIn PDF document text
    • https://site-1204780.mozfiles.com/files/1204780/mesuzezugozusuxefur.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/ajc9hgD/94032802330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449600/normal_5fd65bec54231.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471704/normal_5fdfc4f760b4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gonuxiwela/xanexoretu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 4620 bytes
SHA-256: 6617de73aaf34f5b1fc1860f7789e0fa8d6cdc66a8ca360e3ff6b8b943002636
font_01_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 11780 bytes
SHA-256: 6cfde43dfb0e1e212aa5c073a348f10d0c859e5e38db40d92ce72ce541777829
font_02_sfnt_off00012ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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