Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0ec92315eaa40b…

MALICIOUS

PDF

78.2 KB Created: 2021-03-25 18:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1756edb6a97cadd57cfe4d48bc3255dc SHA-1: 08862efa3c18edfdfcc64e5c50482181c268aec4 SHA-256: 6e0ec92315eaa40b23638c94428885a5b999fa21a91d1af82f7b1e34015c42f1
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting it's part of a link farm or phishing campaign. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=verzus+minimal+keynote+template
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/03d606815.pdf
    • https://rofobanajogano.weebly.com/uploads/1/3/1/1/131164113/8834682.pdf
    • https://kumobavubisu.weebly.com/uploads/1/3/0/7/130775432/3999171.pdf
    • https://juvezunadu.weebly.com/uploads/1/3/5/3/135306862/surimaluwixif.pdf
    • https://fineruliji.weebly.com/uploads/1/3/4/3/134313455/4e64a47eb6e24.pdf
    • http://lalikexitaxixix.getenjoyment.net/kipufobizofofapetubuwagi.pdf
    • http://mitimewigupito.mypressonline.com/nusix.pdf
    • http://mufinofol.scienceontheweb.net/abundant_life_bible_study.pdf
    • https://febewizonobuwom.weebly.com/uploads/1/3/4/3/134311996/8e0da65045ef7d.pdf
    • http://kevarusakoko.mypressonline.com/richard_bandler_the_ultimate_introduction_to_nlp.pdf
    • http://gigezesuzobe.getenjoyment.net/mathematical_formulas_for_competitive_exams.pdf
    • https://niwejipudid.weebly.com/uploads/1/3/5/3/135383293/5adc2852c291f.pdf
    • http://jokegave.mywebcommunity.org/fibisuwizofedeza.pdf
    • http://vixegoxufareka.getenjoyment.net/63199287066.pdf
    • https://wopufibirebosaw.weebly.com/uploads/1/3/4/4/134466277/zareweja.pdf
    • http://xumupizaxuto.scienceontheweb.net/pezanarokenofoni.pdf
    • http://potozafit.medianewsonline.com/58794657219.pdf
    • http://xariketixagat.mypressonline.com/41172519445.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0ffdd24b-620b-4f4d-94ef-a39da1ca20bd.filesusr.com/ugd/853ce2_0b80a5a4a8ea4fb5adea3b7820d2d560.pdf?index=true
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_cc791764e8de415f810c805f48de0564.pdf?index=true
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_190d7d882f1e42c0ba813af3bca5fba5.pdf?index=true
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_cc757d89183e4583827c7ee1e79ff4bc.pdf?index=true
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_6650c180a09141ebbd27686d097ce563.pdf?index=true
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_cd9a94fa91b4415faccaa33ee9427c39.pdf?index=true
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_c2dacf8807bd4ed58f75c56bf4147906.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f619.bin
899c0bfce539e6310c3e22269e18e9a3a3d1b607b1f85c2bbf51558aada736ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF619 5144 bytes
font_01_sfnt_off00010794.bin
413d21c56f893da2bb3f54710350ccb0ad522b538c1aeab51416dd5fac33d5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10794 10428 bytes

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