Malicious PDF — malware analysis report

Static analysis result for SHA-256 2512e15deec0c956…

MALICIOUS

PDF

67.4 KB Created: 2020-12-13 21:00:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: af2df23c95f49dd31afec78f2b4a78df SHA-1: 1b54e3cd42e1536dc352435f3f68985483bc3956 SHA-256: 2512e15deec0c956e95ece488d7563bbb196e9d8c49715b72cfd06acd4801927
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://gettraff.ru/wb?keyword=get%20bitmap%20size%20android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_5f8e4823a53c2.pdfIn PDF document text
    • https://jisevudes.weebly.com/uploads/1/3/4/8/134882916/69207.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/2168064.pdfIn PDF document text
    • https://xeseboda.weebly.com/uploads/1/3/4/3/134323550/3241200.pdfIn PDF document text
    • https://sibotapitagota.weebly.com/uploads/1/3/4/3/134378411/zezusabumapo.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/6661756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404524/normal_5f9282c2f3ede.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418370/normal_5fcdbfe6d1d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5fad7b0988f7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_5fbc5fd55ceae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451220/normal_5f9f40c120bcf.pdfIn PDF document text
    • https://menuwenuxunok.weebly.com/uploads/1/3/4/6/134682317/zutad.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/0f0ca621-2757-4b6a-a243-77ce89ce2ecd/12386139097.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/deed_of_sale_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c85d467-8154-45a2-932b-eddab4a75dd3/5e_order_domain_gods.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_off0000c91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91A 5296 bytes
SHA-256: 9fc3932f3824d380b3443bc7bda45370317a16d4b643b669c465defde46cfd2b
font_01_sfnt_off0000db02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB02 11096 bytes
SHA-256: 1ade9d4d95b0a1fc431d760364f25de5359d8d36dfc803c78b315b5e3591e6d8

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