Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfdc2adda1de45f1…

MALICIOUS

PDF

71.2 KB Created: 2020-12-29 16:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2a44771d90685f91772b1f004965a36d SHA-1: bc401a924d35da7e75dbe18322785857b460fd65 SHA-256: cfdc2adda1de45f119f0c74d71f5cb95928fe1524471044e5ca3a2def4a94f36
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a link farm. The document body, though partially corrupted, suggests a lure related to 'weed legalization tracker'. The presence of multiple external PDF links and a critical heuristic firing for malicious redirector links indicates an attempt to lead users to harmful content.

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://traffine.ru/strik?utm_term=weed+legalization+tracker In PDF document text
    • https://static.s123-cdn-static.com/uploads/4387589/normal_5fdea4b9bbd11.pdfIn PDF document text
    • https://nurixuwabojud.weebly.com/uploads/1/3/4/5/134587723/4eb712c4454e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5fcf70aff1171.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/hiqhjl1/english_nursery_rhymes_wheels_on_the_bus_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392661/normal_5fd0de9ad76d3.pdfIn PDF document text
    • https://rarowovi.weebly.com/uploads/1/3/4/6/134664267/faxat-lipigo-fefiguwilepurux-xofizozewuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45279f5-0d31-43cd-b4a1-8652063055d2/fuxukekuxagejumujexogudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee97398-8291-482c-93e5-b4466920aa64/building_spelling_skills_grade_3_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/244c7f3d-dd47-43f3-b7ac-d9e75dc52e6f/nuvasujuxudovareketesus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f89135-492f-4ba6-8636-5ecd9d26cf3d/kerawoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81bddba4-30d8-47d3-8328-6227ce4f9fcb/sql_server_interview_questions_for_freshers.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_off0000da8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8E 5056 bytes
SHA-256: 0a230bc8337167cf91b7d5e5e73f3a6a552798a9c486f7a94660e8e8aecb9fda
font_01_sfnt_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 10652 bytes
SHA-256: 8c00a2696ec656093dc290f50af3a07548a1758beaa10befcee73f6d8a010958

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