Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e605902b53587d1…

MALICIOUS

PDF

65.3 KB Created: 2021-01-25 12:19:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 18dbef5b24bc9df2148f6f04f9fa9b99 SHA-1: ef969e3fdcf94a310f8d688c42054f1f0c602b39 SHA-256: 5e605902b53587d1d8ca965ef62d09125c32deccbbf32956dbb6ba3097f20219
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, including one pointing to 'seumenha.ru' which appears to be a link farm designed to redirect users, likely to a malicious payload or phishing site. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious intent.

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://seumenha.ru/wb?keyword=doodle%20jump%20download PDF link annotation
    • https://wufodiwefoveve.weebly.com/uploads/1/3/4/8/134891768/1929923.pdfIn PDF document text
    • http://tufataf.22web.org/63554462992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467577/normal_5fdeead9c6d8c.pdfIn PDF document text
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/bubovasolane_kezipijuvojewo_detegaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_600de086be914.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389384/normal_60096c6ca7244.pdfIn PDF document text
    • https://jadojojipolukot.weebly.com/uploads/1/3/5/3/135337887/648e4d0ab.pdfIn PDF document text
    • https://nabebumiz.weebly.com/uploads/1/3/1/4/131452902/1872125.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mudefikireneb.rf.gd/96954710558.pdfIn PDF document text
    • http://sabenimuzu.rf.gd/ieee_word_document_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/fiduzosaxoka.pdfIn PDF document text
    • http://vixabediwudofi.epizy.com/68959609212.pdfIn PDF document text
    • http://pijularof.epizy.com/approximately_synonym_formal.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/tenomagufidekakoriwunugik.pdfIn PDF document text
    • http://nasapatede.epizy.com/59593592028.pdfIn PDF document text
    • http://vekujekodabudu.epizy.com/descargar_android_9_para_galaxy_s7_edge.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/zuxuko.pdfIn PDF document text
    • http://lakelasu.rf.gd/2322486531.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_off0000c462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC462 4996 bytes
SHA-256: 4568cb3573e71af0854b9d895bee3557478f335c99b6bfd8c2ffe24bd027b989
font_01_sfnt_off0000d564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD564 10356 bytes
SHA-256: 31d9a184617cf74fe449f6d7a6a982702ae174d2573e17b10afdf270231b6684

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