Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ae4f577f70a301…

MALICIOUS

PDF

79.5 KB Created: 2021-01-28 11:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d5b79983ff9b37f83c9b4dc31dda8e04 SHA-1: 3a6eb732d389e1d094ed7ffa99292dd58abb1e6f SHA-256: d9ae4f577f70a30185c1c0a46f8c390fd7e0d11b3eb3babaaf66dc8ec7034167
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://crophysi.ru/aws?utm_term=limbo+rock+line+dance+step+sheet In PDF document text
    • https://xuvajova.weebly.com/uploads/1/3/1/3/131380845/nozolebuneni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5fccd127f02cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411245/normal_5ff6534797c3f.pdfIn PDF document text
    • http://rerubin.space/father_and_son_quotes_in_night57kxm.pdfIn PDF document text
    • https://nalovitifa.weebly.com/uploads/1/3/4/6/134600698/2558260.pdfIn PDF document text
    • https://jowufawogutezob.weebly.com/uploads/1/3/0/9/130969037/peviriwavilefa.pdfIn PDF document text
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/64fafd.pdfIn PDF document text
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/tuvulexuvegopiral.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/5557527.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/dgjlw5H/get_a_slice_of_the_pie_meaning.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/happy_birthday_cake_images_download_hdw3q4b.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/6488695.pdfIn PDF document text
    • http://copyrightram.net/xenosonexitidamopezozxx6o2.pdfIn PDF document text
    • https://lefafikof.weebly.com/uploads/1/3/0/9/130969708/jatazilufu.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/popisiburewixuj/oxford_university_press_aqa_chemistry_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/safta_certificate_of_origin_form_e.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/sopikovotegoze.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/28880239996.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_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 5456 bytes
SHA-256: 3a84f5344502ff0b5e5a80bce38602ef027d3bdb38e5b1e089b560722f936a55
font_01_sfnt_off00010824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 12472 bytes
SHA-256: 65d0c010b638e26faf556c03f3c6cecbf33134031b6d71e6b1b1fd01e586a7f1

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