Malicious PDF — malware analysis report

Static analysis result for SHA-256 96074d369b54c527…

MALICIOUS

PDF

69.3 KB Created: 2020-12-14 16:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8b001957d3cc5aba3bb631401e2d5eea SHA-1: bd7d23916fd7ca3620aa949a4d72a84c694b7a0a SHA-256: 96074d369b54c527d108260066dbc7c96fb1452ae5d082c2022238a872c302b1
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate this PDF is designed as a link farm, likely to distribute phishing content or malware. While no scripts were explicitly extracted, the PDF structure and link farm behavior strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://traffking.ru/123?utm_term=uva+law+course+registration In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5fa06ffd34ec3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404123/normal_5fbf0b7241833.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426942/normal_5fc5714ab7f1a.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/junixegawaxepu_joxepakadilixaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_5fae95c377dba.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/felasorarabipis/ielts_academic_reading_test_papers_with_answers_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/punctuation_worksheets_for_grade_2_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/circuit_court_case_information_arlington_va.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/losiroxaki.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_off0000d2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B7 5112 bytes
SHA-256: acd26a782f0cfe6d6e01cb0d2ab6f5bdd2164c681ec127208d7d52c8a664829f
font_01_sfnt_off0000e443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 10580 bytes
SHA-256: c315d79da805ca3921715d03ea4784843ae370ff8ba91ab55a8a467dda915abe

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