Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e9246e39863cc2…

MALICIOUS

PDF

79.2 KB Created: 2021-05-20 21:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b11878f8e7b4c154c9a0b5dcf8a233fe SHA-1: 7b16de503f14d775cf9173ddc6209e25bef07ce6 SHA-256: 29e9246e39863cc25f47e85191f8f6521a7cb3a3e8d2bd050aba9e057d9c6fe4
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack vector appears to be directing users to external malicious sites via these links, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • 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.
  • 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=houses+for+rent+no+credit+check+no+deposit+indianapolis In PDF document text
    • https://static.s123-cdn-static.com/uploads/4384817/normal_5fdef82461aa2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471236/normal_5ffeafc3a1512.pdfIn PDF document text
    • https://menimewutezosel.weebly.com/uploads/1/3/3/9/133997121/dumanelusasobak_pilerep_ravamifidi.pdfIn PDF document text
    • https://nofuzibid.weebly.com/uploads/1/3/1/4/131453406/nexalonomidebituv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465701/normal_5ff9714b7ec5e.pdfIn PDF document text
    • https://sunuzokelegawo.weebly.com/uploads/1/3/4/4/134476032/93cf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5fcf7c3c4dc0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370076/normal_5fde5d8c199d6.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/vowotovisipepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417141/normal_6065005607572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472506/normal_60541ef795b4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_60515de0e04d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_604397d564ccb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_604950accc98c.pdfIn PDF document text
    • https://xazalonabi.weebly.com/uploads/1/3/6/0/136086847/vesegorekodob_fijonitafesifa_kudamupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446151/normal_601b6cdc2c563.pdfIn PDF document text
    • https://farevilifowo.weebly.com/uploads/1/3/5/3/135390938/noxafisebafan.pdfIn PDF document text
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/0660b39d342.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501360/normal_5fe14224cae3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_5fd6310f164fe.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/8a0306f6-660f-44c2-8332-1cc15e3ff3c6/71483067807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9ce39f-6b3f-462e-bed5-9b5523b4f284/solving_quadratic_equations_by_graphing_practice_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62503926-4dbb-4d5c-a8a0-8c682a07b576/visual_basic_.net_programming_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f2b87d-72e3-44bc-b9e6-815478a5bddf/87254268167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6f01d80-168c-41ad-a409-c0eab67638f5/82447360456.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_off0000f31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31F 5268 bytes
SHA-256: df4d51819f663b4ca31f994e91f02d10a3629c947eb6dfb8c25541acafa05893
font_01_sfnt_off00010500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10500 12556 bytes
SHA-256: b6ad78c59705f7a8860809a8e6402481c944d9725e5c1ed565bcbf18e3aa81e1