Malicious PDF — malware analysis report

Static analysis result for SHA-256 37983df65b1d655f…

MALICIOUS

PDF

72.5 KB Created: 2021-02-16 16:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b33f1fabc7dc9f77bb48e00f5360c9da SHA-1: e572cd2cab92d5f3661f9246d66ee74b01b2fca8 SHA-256: 37983df65b1d655fca402bdb66adde1090caf9d1fded39d4fb1703d1132a38f8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/wb?keyword=what%20are%20the%20main%20ideas%20of%20the%20mayflower%20compact In PDF document text
    • http://momsmall.space/hagalo_usted_mismo_carpinteriae9n8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466661/normal_5fc8b03a4ef43.pdfIn PDF document text
    • http://voyazh-shina.com/vufamezifonalfcs7h.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/3Q4Fign/nitabeza.pdfIn PDF document text
    • http://wowit.pro/united_nations_global_compact_progress_report_2018srxds.pdfIn PDF document text
    • https://cdn.sqhk.co/ledusefugize/zhegjij/stack_ball_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/nazujovo/iajjyNe/franchise_hockey_manager_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/iagfjfY/32078903218.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/hh6KrCD/zamizuverigipagenewo.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/ihojgyE/pixel_puzzle_collection_hints.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388169/normal_5ffcac66363a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408195/normal_601b49698cfa8.pdfIn PDF document text
    • https://cdn.sqhk.co/dugudumopup/hhJgeie/fosafixozasumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450337/normal_5fea40f20452f.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/gjzhdU3/76700229670.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/xozeb/cardiomegaly_causes.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/61146530022.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/61825208233.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_off0000de3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3D 5604 bytes
SHA-256: 464582c6e32f6c8d0c2faa9772d8939b14a65a610f69034145ff6b101b1ba8ab
font_01_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 10416 bytes
SHA-256: eddcc4fcbe04b3d0985182ef4cbc46f8f21af9a308a8b3cf6273fe28abfc319a