Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc9f1f9c0bf1995…

MALICIOUS

PDF

67.5 KB Created: 2020-12-25 23:56:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1d93f07be102a19b790e9e4ae78812bb SHA-1: 322659b10409c090c2d2deeef090308eaef60869 SHA-256: bcc9f1f9c0bf19959e81cf113b556d89e258b5b8776e5b73bf7ff31d73970362
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or scam attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, likely for SEO manipulation or to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution.

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://ggtraff.ru/strik?utm_term=bunny+boots+for+sale+canada In PDF document text
    • https://feposejixadolo.weebly.com/uploads/1/3/4/7/134744373/varojugatuwefem_sukuku.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/9897893.pdfIn PDF document text
    • https://melijezaziwoni.weebly.com/uploads/1/3/4/8/134851492/rivof.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/goranadoxibuma_salovugojorelo_ranatir_furuzu.pdfIn PDF document text
    • https://lobakazuperowe.weebly.com/uploads/1/3/4/3/134352895/7945091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f878e2e6f069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_5fa352545d811.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/sabegokek/android_version_8._0._1_name.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/hacked_earn_to_die_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/58346727477.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/80739270577.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/animals_worksheet_elementary.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_off0000c9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F6 5304 bytes
SHA-256: 107b8832cec7f3b2a5ef278ec296e6ed480f8a3720238d7fe7c057a2b166851f
font_01_sfnt_off0000dc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC14 10780 bytes
SHA-256: 7f75278cd8106c08cc3df3132c12311ba0d2c4cc3cced307c72760f0e89faa27

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