Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7f0cb5b9352d1e…

MALICIOUS

PDF

74.5 KB Created: 2021-01-16 13:09:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fcb9779d6c17bbb3e5db22b4bdab4c4d SHA-1: 0bb9418dc6ab37a8862fad7dfa35ee1e221b1a6f SHA-256: ee7f0cb5b9352d1e8270bfbd61e89a5df336650b940cadf205420e796f72fbea
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. It also contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection scheme. The ML classifier and ClamAV also strongly indicate maliciousness. The primary attack pattern involves luring users to potentially harmful websites.

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://traffmen.ru/aws?utm_term=scheme+of+work+pdf In PDF document text
    • https://cdn.sqhk.co/romumoxoleno/aAmhbfS/69931645680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407331/normal_5f98c095371c9.pdfIn PDF document text
    • https://xobagosuwetir.weebly.com/uploads/1/3/2/6/132680986/lifalo.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/gulujetuvobowe-ramolefezize-rarunob-wevonusezo.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/9416299.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nonabafat/positive_performance_review_phrases_for_job_knowledge.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/91711056692.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/tracing_shapes_worksheets_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/hugo_boss_blazer_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/camera_360_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/jewivulujazofoduwujovi.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/cyclizine_50_mg_patient_information_leaflet.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/tridiagonal_matrix_algorithm.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/99478678537.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB47 4788 bytes
SHA-256: b67b5d49d20e3a479a82b8678458d55ee703b9a30a21676cf9de8731346d6ae0
font_01_sfnt_off0000eb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB92 10488 bytes
SHA-256: 501bf18d6636338fa7bff1ed329f9709d79132a69eae2e50b1dfd4aa10321003
font_02_sfnt_off00010f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F62 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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