Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9eaf5731cf8eb13…

MALICIOUS

PDF

63.2 KB Created: 2021-02-15 04:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 78bc230555bf8ed899e2f84a25783da4 SHA-1: 214f7ef603eadad0072670a66304a5c7b4288baa SHA-256: b9eaf5731cf8eb13f77ebc9096d42c36a126274149d78b0d22e12f2763cf11ab
186 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/123?utm_term=kurgo+dog+harness+petco PDF link annotation
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/kememizatezenuxiz.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/cSBmihU/43722829343.pdfIn PDF document text
    • https://minedikatew.weebly.com/uploads/1/3/0/7/130739540/2261174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_5fe6eb237a76f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_5fd994bf6d019.pdfIn PDF document text
    • https://sazunanu.weebly.com/uploads/1/3/4/5/134596286/7a5f56b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_6029c918af608.pdfIn PDF document text
    • http://findattime.com/answer_key_jee_mains_cbt_2018v0l4h.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/d5iaKWg/garonapogo.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/hhaYjb4/prop_hunt_code_fortnite_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475562/normal_5fd14cb7c7332.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/74rEGmv/manapakkam_kanniamman_part.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/fatisake/55146160318.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/38242013191.pdfIn PDF document text
    • http://reditab.epizy.com/92139682812.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_off0000b973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB973 5272 bytes
SHA-256: 21f4752914ece23427aa4c4ff9fd11a1111ca93f0130a552cac25eaed46b835e
font_01_sfnt_off0000cb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB65 10856 bytes
SHA-256: 93b5fdc7a2d38ea5fe352010c75e46154bbfedf6dfb0bbb955c95ab4a504cab9