Malicious PDF — malware analysis report

Static analysis result for SHA-256 164b3542e94bbe39…

MALICIOUS

PDF

97.1 KB Created: 2021-05-30 04:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 67e128729aa307738fbb247f7be527c4 SHA-1: 24224de55ffc5c4ad086c767c32407ac14d4b8cc SHA-256: 164b3542e94bbe39fdb775681dc46f794499c047de95def422fc0821b2dcb082
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure for search terms related to movies, likely to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/strik?utm_term=new+barbie+cartoon+movies+2019+full+movie+in+english PDF link annotation
    • https://vepegusekukoj.weebly.com/uploads/1/3/4/4/134470637/4358158.pdfIn PDF document text
    • https://gokidobizivoji.weebly.com/uploads/1/3/4/4/134495246/6138625.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/c3446bd.pdfIn PDF document text
    • https://luribexibaw.weebly.com/uploads/1/3/4/7/134750384/5ed221f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407996/normal_5fd125b86f212.pdfIn PDF document text
    • https://wojawiso.weebly.com/uploads/1/3/0/8/130813991/7ae97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388412/normal_5fe53d7643f16.pdfIn PDF document text
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/luroluwizemari.pdfIn PDF document text
    • https://tofavasexivefet.weebly.com/uploads/1/3/4/5/134578877/1d4621d4.pdfIn PDF document text
    • https://nukesusidogix.weebly.com/uploads/1/3/4/6/134608931/farivijuvexesix_niluduronu_dugekur.pdfIn PDF document text
    • https://jijukufopu.weebly.com/uploads/1/3/4/7/134735153/3619441.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/31601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418590/normal_603eead450fb1.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/5778339.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bed376ff-b0c0-4b34-8cd3-1a5b61e70b88/california_800_fee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec85735-4c8d-48ca-8dc4-e1c496a67cc1/how_do_i_set_up_kindle_on_my_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3446c9c-b127-4aec-a622-3f4a74775064/dont_shoot_the_dog_en_francais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051459bf-d899-4461-9271-8c528599e48c/dapikonunevujotozije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8289fd51-86ea-462c-829a-207f63cc6c8a/25965917949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e4f6e1e-6752-4dfd-937f-5f31fd078f0f/19487705595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19494134-f72d-4998-af17-feb6e1eea39b/56220928102.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEB 5920 bytes
SHA-256: 6cde1e1adb8886e8e7594e8d05da67f2dd002168e42f48b07b242e4f5211686f
font_01_sfnt_off000130fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FE 4156 bytes
SHA-256: 7fa19d9a6d5ab9059d2b83660c6a3e5e556c8a95ac1a21f2ea8608ab6014a585
font_02_sfnt_off00014099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14099 11584 bytes
SHA-256: dd50ba1f022139aca16a04254fe3827d3c0a59643ed94a9f419fbef9d68a1751
font_03_sfnt_off000167e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167E2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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