Malicious PDF — malware analysis report

Static analysis result for SHA-256 027405f101c22d49…

MALICIOUS

PDF

74.0 KB Created: 2021-02-16 00:01:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b4e70a8b8848d3ebbd194dc3e0de4d75 SHA-1: f4fd98d6c65ea251d66409cee1c2321fc78dfcf8 SHA-256: 027405f101c22d4968e26c2fe916fd6c0280c1ac94cb5ca889e315feda4f2acc
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL is designed to trick the user into clicking it, likely leading to further malicious content or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://crophysi.ru/strik?utm_term=which+krispy+kreme+donut+has+the+least+calories In PDF document text
    • https://cdn.sqhk.co/bujerinalo/agwaRLo/ncert_solution_class_10_maths_chapter_5._3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_601f150f5095c.pdfIn PDF document text
    • https://cdn.sqhk.co/fazituku/hhtnhgq/baller_shot_caller_20_inch_blades.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/takurugilij/jejelojejedavesolojolizo.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/13447809435.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/xwindows_for_aix_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/dufatozabebemigowox.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/gigevij.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/sefuredodapus.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/dufigujikud.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/priya_basanti_odia_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/maths_questions_answers_class_7.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/daily_todo_list_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/55540656273.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_off0000e1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E8 5492 bytes
SHA-256: c8a8079afd022d4c2b8fa82fd4fc17e11b1fb11f99839f9a9857bcacc55aece3
font_01_sfnt_off0000f482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF482 11288 bytes
SHA-256: c56a14e8ed9046c08634a07205f26eb6091846f0dd17b6211ff7238607eaa0b0

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