Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cf24b9e2d2a3b6…

MALICIOUS

PDF

103.5 KB Created: 2021-03-08 21:46:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b466f4d7d7c80f29ad937315f6264869 SHA-1: d17e0e810fb8e8d5298b9f6769b3c5bd2373d50e SHA-256: 06cf24b9e2d2a3b67e6dc295b8a14fc3ce9f68fdbc7a14c98bebd32d63e527a9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, including one pointing to 'zajinet.ru', which is likely part of a phishing or SEO link farm strategy. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=lenovo+y50-70+specs PDF link annotation
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/ginusini_japabitedebunin_midopexetepet.pdfIn PDF document text
    • http://vogusazujijufo.22web.org/57756562210.pdfIn PDF document text
    • https://sejirefado.weebly.com/uploads/1/3/4/6/134682993/kosedamoxetobopese.pdfIn PDF document text
    • https://romenugerod.weebly.com/uploads/1/3/5/3/135317494/1489847.pdfIn PDF document text
    • https://wevikafajaxa.weebly.com/uploads/1/3/1/1/131164556/b6bc778c34.pdfIn PDF document text
    • http://josebixotarez.22web.org/bailey_and_love_26th_edition.pdfIn PDF document text
    • http://birunirako.22web.org/38500584615.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
    • http://tefagagegupavos.rf.gd/animal_kingdom_series_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/piriformis_pain_walking.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/bishkek_tourist_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/76806874779.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/arshinagar_movie_in_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/lodge_cast_iron_dutch_oven_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/dibidogobudokiz.pdfIn PDF document text
    • http://woxenebifa.rf.gd/zoguxopamusadumezudura.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/hr_competency_development_guide.pdfIn PDF document text
    • http://wadedizori.epizy.com/xofad.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/54686911166.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/23398791570.pdfIn PDF document text
    • http://patemud.epizy.com/18043773921.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/hustlers_movie_parents_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001359b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359B 4728 bytes
SHA-256: 0fa2a6479fb8a2e0869a739107b3af673f9ee0ba75928903980e899a554c3396
font_01_sfnt_off000145d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D4 11064 bytes
SHA-256: 378332d3cd54aa3c2382ddf86498afbf0482232bcfdbf62d249ed2d109e355bf
font_02_sfnt_off00016bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BDC 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_03_sfnt_off000180a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180A4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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