Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb41ad845abeabea…

MALICIOUS

PDF

77.8 KB Created: 2021-03-21 08:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 609e9c0c6cd64a375df2c6c7ebdaa075 SHA-1: aa59c885effac3c7a501cbbcb86efae8191f3c0e SHA-256: eb41ad845abeabeae18f4aa16f913f6b3a74b8cd5e5235e5bc5e360d5247d833
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, embedding numerous URLs pointing to disposable hosting, likely to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/wix?keyword=el+rey+arturo+2004 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387054/normal_5fe57153bd3bc.pdfIn PDF document text
    • https://gurufikenifa.weebly.com/uploads/1/3/2/3/132303388/xisaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490269/normal_5fc9b5851f55f.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/zipepuvosede.pdfIn PDF document text
    • https://kudaxemukuwofi.weebly.com/uploads/1/3/4/6/134691428/dasipel-dorigozep-kapasa-nifuku.pdfIn PDF document text
    • http://mjawebdesign.net/download_sweet_baby_girl_halloween_fundjx33.pdfIn PDF document text
    • https://tabawowap.weebly.com/uploads/1/3/4/5/134599755/vivut_neperorusulaz.pdfIn PDF document text
    • http://solapp.xyz/722593156396krlv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_603a7b80cc2f7.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/savage_model_30_shotgun_disassembly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://marurutefa.atwebpages.com/presente_simple_en_ingles_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09685df1-8b1a-4363-aa1e-e592a9715fa2/37990233146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e5d769-c42f-4aa1-bc0b-86cd1d89d7ac/getekadapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d1514c2-77b4-4e07-86bc-209093be33de/telefowafitiriguzalu.pdfIn PDF document text
    • http://jibimom.myartsonline.com/what_to_name_my_small_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5df520-5c12-4006-bd7c-f62076c22890/what_is_sutton_hoo_famous_for.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_off0000f045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF045 4920 bytes
SHA-256: 1c77db44da09bbd80627a0f82991ec20d1d89941ae451a9453940487266a339d
font_01_sfnt_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 12496 bytes
SHA-256: 19591a576df569d73407e8e9959b7d13e4fc5a827f9efa56ebcc7c85459f6da8

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