Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a74c0d3aeeddac…

MALICIOUS

PDF

71.0 KB Created: 2021-04-11 17:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cca6eebd8679bbcceed515252467e596 SHA-1: eec09051053596f2e71983735097bc792c108be3 SHA-256: 62a74c0d3aeeddac1c456a45b4a8bec079a282f2dc6292cd8efdc11b2749ada5
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/strik?utm_term=what+to+do+when+your+power+washer+won%2527t+start PDF link annotation
    • https://nefolebar.weebly.com/uploads/1/3/4/4/134400051/8976d23f6fbc53.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/file_convert.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/TAV2ggR/vudusir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_605c050d8bc8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470979/normal_5ff2fa741022a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480174/normal_5ff83267089b3.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/dinike.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/eOqKzhe/tap_tap_tap_tiktok_song_clean.pdfIn PDF document text
    • https://cdn.sqhk.co/tapowifilez/bP4jinr/63698330925.pdfIn PDF document text
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/mikakositozizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426541/normal_6050dff105b9e.pdfIn PDF document text
    • http://mujubow.getenjoyment.net/dusunuzipetoxuvarakiduker.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/it5gcii/zazotiwekesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_60530142f2874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_6067d55515c88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_600c9f12bfea2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_601eba505c126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471081/normal_603b9a942cdd4.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/epson_xp_800_printer_problems.pdfIn PDF document text
    • https://kuluvopejad.weebly.com/uploads/1/3/4/3/134375189/1335178.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/813b9d68-2530-427a-83ad-580d19bb3427/57453460360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39de1f9e-6bd9-42ce-b38e-6de99a4d015e/what_is_political_and_cultural_landscape.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_off0000d98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98A 5256 bytes
SHA-256: 4dab60170cfd4a8bd642082d261e6a15f6d231ab4849efcbd37b50f0e54dc763
font_01_sfnt_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 10060 bytes
SHA-256: d6a3ae05d21c53c4d37915697c4921a66df2fe8a7a75c765b3e4ce150dd98b04

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