Malicious PDF — malware analysis report

Static analysis result for SHA-256 99668d2dc6ac8e57…

MALICIOUS

PDF

76.0 KB Created: 2020-11-24 07:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 58f76687a329d4cd0c88ecde3d2027e2 SHA-1: 167ee949e6f648eba56887121e13aeae785f9d6a SHA-256: 99668d2dc6ac8e5754ef10e82ad4d6920d0ca5e2c243719cbd43705816506cad
214 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics as a malicious redirector and link farm, indicating a phishing or malware distribution attempt. The embedded URLs, such as 'https://traffking.ru/strik?utm_term=duffy+malt+whiskey+bottle+price+guide', are likely used to direct users to malicious sites. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?utm_term=duffy+malt+whiskey+bottle+price+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470692/normal_5faa2286812f4.pdfIn PDF document text
    • https://vixalabalu.weebly.com/uploads/1/3/4/3/134396729/gemaxoriwogizisuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384652/normal_5f95904b69a7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_5fa747e902ec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_5f9749df12eb7.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/pasepavixufevowatose.pdfIn PDF document text
    • https://ligavovifoma.weebly.com/uploads/1/3/4/5/134522072/rupegerorat.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/180151.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/pajukovuxetu/compass_group_plc_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/67392691635.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/13494351054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b09dc9-cc16-47f5-a0df-054639ac5af4/dawaj.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/aritmetik_dizi_toplam_forml.pdfIn PDF document text
    • https://s3.amazonaws.com/gozega/supply_chain_systems_analyst_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/42847061628.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_off0000e696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE696 5964 bytes
SHA-256: d8dad4eca5e3b21b62045fdfc2f61858c63b912581ce57ec9ffdd08aea3c5b93
font_01_sfnt_off0000fad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 11840 bytes
SHA-256: 15d6bf8d56d6a78d9cda6456ad2d26e8fc5451a02796eee901ea4c8bc3ad743f

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