Malicious PDF — malware analysis report

Static analysis result for SHA-256 3810c6fe99b8c5f9…

MALICIOUS

PDF

79.2 KB Created: 2021-05-31 13:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 520b8f370ea85f12957cc0691cfbeb48 SHA-1: afaa8338cc3e01fed6e45f03e977b1ca67c60039 SHA-256: 3810c6fe99b8c5f9ec11caad782d2001eaaf41fe37126018cc41f10c51f954ae
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains keywords related to movie downloads, likely serving as a lure to encourage clicks on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=new+hollywood+movie+hindi+dubbed+free+download+in+hindi+hd+720p PDF link annotation
    • https://figenudar.weebly.com/uploads/1/3/4/7/134754197/b278e816b9b7dd.pdfIn PDF document text
    • https://fiverepibimasi.weebly.com/uploads/1/3/4/8/134893498/5494458.pdfIn PDF document text
    • https://lovefuzabuzonif.weebly.com/uploads/1/3/4/1/134109130/foxatixedi.pdfIn PDF document text
    • https://xovotirepotu.weebly.com/uploads/1/3/1/4/131412955/584420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_601f2b1ecb2fb.pdfIn PDF document text
    • https://zovodexipelozas.weebly.com/uploads/1/3/4/4/134401167/gumakesabajoputipute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_600ea9bfd20a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471948/normal_5fdec5a4e5da8.pdfIn PDF document text
    • https://lotekovikerux.weebly.com/uploads/1/3/1/3/131398560/zuzib.pdfIn PDF document text
    • https://pekupepavipojev.weebly.com/uploads/1/3/1/8/131872203/6366610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_606e8fbf6379b.pdfIn PDF document text
    • https://bajiwiga.weebly.com/uploads/1/3/1/3/131379875/movuwoxozapoda.pdfIn PDF document text
    • https://subogepaweb.weebly.com/uploads/1/3/2/3/132302814/xumozolala.pdfIn PDF document text
    • https://fiwaluveniwob.weebly.com/uploads/1/3/5/3/135395264/7561707.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/d32263f6-3b35-4cb0-b506-8c203cf69d83/zelda_majoras_mask_soluce_3ds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c06c0c-5538-45c2-9c0e-aba86c40faff/para_que_sirve_jengibre_con_canela.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_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 5820 bytes
SHA-256: fe86f2bbb2829752ebc2b805545452682af278154f739a0f7768a7ef30e45339
font_01_sfnt_off000109b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B9 11036 bytes
SHA-256: 660d3dad741b2e6a8a18ff4d424b532085c1191cccbccc9a556d675ba09e64fe

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