Malicious PDF — malware analysis report

Static analysis result for SHA-256 594cfc590a38c780…

MALICIOUS

PDF

73.1 KB Created: 2021-02-21 15:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2c00b45115aec0166e396439de49a8b3 SHA-1: c7de86447affb37297beb0dc7da04dc364bd961a SHA-256: 594cfc590a38c780a1ec3f54ed1a6207d6986678a30d7133309b05b6fd3ebf6d
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure the user to a malicious site.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=profoundly+app+is+indian In PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5fc7d580a49df.pdfIn PDF document text
    • https://pukapukipek.weebly.com/uploads/1/3/4/6/134636258/6804726.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381289/normal_5ff905c42d252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_60100f308421b.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/jVhDqgd/my_business_course_accounting_answers_chapter_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465935/normal_5fcf0c86c5561.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/2dH6hfk/norway_road_trip_bucket_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420441/normal_6031ed325b7a5.pdfIn PDF document text
    • http://bufo.online/42975512117nboy5.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/X0Djegg/mirtazapine_class_of_drug_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/sokaxopoje/HlhaBRH/cara_filter_bling_bling_tiktok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481994/normal_600fcd8fdcff8.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/gizevo_fuvulumilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_5fda972823188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_600fd30940e51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506170/normal_5fda00349c54b.pdfIn PDF document text
    • http://podcard2020.site/c_form_check_haryanabnydw.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/megodipewukitoj/fereverefubal.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/lupulapexulojosikelavale.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/subordinate_clause_examples_with_answers.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_off0000e16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 5140 bytes
SHA-256: 1f0d5b7096ee842f7f5ac62f9a6f0b951783cec2fc78d9f3b9d1260480bb0d01
font_01_sfnt_off0000f2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FC 10624 bytes
SHA-256: cfb6930a0cbbd4a3f185bd693b38c7eb6471f18d76529ea7e8f787143a4a1315

Open this report in the interactive analyzer, or submit your own file for analysis.