Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d789fef0fa5331…

MALICIOUS

PDF

72.1 KB Created: 2021-02-26 10:16:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e9f09cd4e80d148f67787e3fa50b5881 SHA-1: dae2988b055e7ef08e6718722e989129d11033a6 SHA-256: 28d789fef0fa5331a9204ab5021e356b2a03eba370178472b5f692a456cd2b98
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=variations+on+the+word+love+analysis PDF link annotation
    • https://sinosopad.weebly.com/uploads/1/3/4/8/134892142/sosubuwuguniruj.pdfIn PDF document text
    • https://libirobu.weebly.com/uploads/1/3/5/3/135336219/supinokipuraxameka.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/blacks_law_dictionary_traveling.pdfIn PDF document text
    • https://xogukozatakik.weebly.com/uploads/1/3/1/4/131453421/godaxevu.pdfIn PDF document text
    • https://zadobezaja.weebly.com/uploads/1/3/0/7/130775221/8719951.pdfIn PDF document text
    • https://korexabareruwa.weebly.com/uploads/1/3/2/6/132680962/df3180962d4398d.pdfIn PDF document text
    • https://ritefebeg.weebly.com/uploads/1/3/5/3/135316582/wujabifukagof.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/70836830339.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/301ba.pdfIn PDF document text
    • https://rofazipupu.weebly.com/uploads/1/3/4/5/134580110/6e5c07d92.pdfIn PDF document text
    • https://bololadagulit.weebly.com/uploads/1/3/5/3/135348095/gikadi_mikadeviga_muniwesif.pdfIn PDF document text
    • https://motaxajofepox.weebly.com/uploads/1/3/1/3/131381237/zesesadimonol.pdfIn PDF document text
    • https://vogitoroxubas.weebly.com/uploads/1/3/0/7/130739894/wixugopava.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/batiku/performance_appraisal_self_review_sample.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/3652492629.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/96707156359.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/math_answers_7th_grade.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_off0000dfbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBC 5132 bytes
SHA-256: 6f8a15c01b8dbf06997bda5c8466fdba1f447a7e098bd83e7f96ab3c91b519a9
font_01_sfnt_off0000f148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 10020 bytes
SHA-256: 7b3ba04a27fdc370614b350e10b78fafb9380acdda6b708e2d9044b8dff69aa3

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