Malicious PDF — malware analysis report

Static analysis result for SHA-256 899a495dd09c47b0…

MALICIOUS

PDF

71.6 KB Created: 2020-11-13 15:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9db742d286559abf8d217b6e0daede23 SHA-1: bfdc4e7adf01525ca7c2bcda07ababcdc8f5c5a4 SHA-256: 899a495dd09c47b019659767b6fdda03918bf06de36b0656d85bb892253442ae
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The presence of a link farm and the ClamAV detection strongly suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further compromise.

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://cctraff.ru/aws?utm_term=tecno+android+phones+with+removable+battery In PDF document text
    • https://naligunuded.weebly.com/uploads/1/3/4/4/134472871/zoweremuv.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/1816054.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/1eaaccf29aae3d.pdfIn PDF document text
    • https://nabutamu.weebly.com/uploads/1/3/4/5/134525390/02772912.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/waxapoz/gestion_de_alcance_de_un_proyecto.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/38723954149.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/sports_terminology_list.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/revaku.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/top_eleven_hack_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/congratulations_letter_template_for_award.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/unturned_server_commands.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/warranty_deed_forms_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/82013911272.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/air_pollution_college_project.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_off0000d7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F1 5656 bytes
SHA-256: d6eca1a2af2dcebbf46fad4ba8351084c8954e0b1947c82cea72fa7f7be96716
font_01_sfnt_off0000eb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB19 11304 bytes
SHA-256: 69cbe10315b40e0a1dd2f2efae6d58ddd1e000d8990890b11c66a092c33c5d02

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