Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6ebc69970994b6…

MALICIOUS

PDF

60.2 KB Created: 2020-12-15 14:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c4cf73a299efbdc670419ae574a5f374 SHA-1: b00bfef5bf0c545d272d9fd28f08e1dc5246edd5 SHA-256: cc6ebc69970994b6bcda1f7634f3258086f96e0174e9efd56c1c37f37a0e8b23
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to external, potentially malicious, content, and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous links suggests an attempt to direct users to malicious sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=principles+of+everyday+behavior+analysis+pdf In PDF document text
    • https://wokukome.weebly.com/uploads/1/3/1/6/131636951/6773334.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/bedijenutowulixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f888f4d081f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379731/normal_5fc604a78ea73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5fa145b7b1ee7.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/zuxadol/natural_causes_of_air_pollution.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/call_of_cthulhu_modern_character_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78b4cc89b935f15e2b8f4/t/5fcfd0d91875ae0d856d6276/1607454937678/14839331530.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/50256182612.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/59532444714.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b078418d7934ac789744/t/5fcae9168dcc5603bee9eda8/1607133462566/titix.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/adobe_fill_and_sign_tutorial.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_off0000afd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD2 5548 bytes
SHA-256: ec8d1afde53d7d73e42b364c969a8c4750e817090ecdb2f12613434796e1489c
font_01_sfnt_off0000c2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AC 9748 bytes
SHA-256: b7ea0f3875b5686c906961475738a6b42612fb81cbae18b3fe7cb232f8aaf939

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