Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67deb5d3a60d9f5…

MALICIOUS

PDF

85.0 KB Created: 2021-01-30 07:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8300a48345e41ac6042c5e259141f2e2 SHA-1: 9c33115c4abc24149ba58148798c95bcd3bc4941 SHA-256: e67deb5d3a60d9f592049f891e1973766503616b194076494c179780429af1f8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs pointing to link farms hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. The presence of external URIs and the ML classifier's high confidence score indicate 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://jacksth.ru/wb?keyword=high%20heel%20birthday%20gift%20ideas PDF link annotation
    • http://doxisodezezaku.iblogger.org/expectation_and_variance_of_discrete_uniform_distribution.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_601495b3e8a51.pdfIn PDF document text
    • https://cdn.sqhk.co/kufusivekogo/fVjfZJ7/syberia_full_game.pdfIn PDF document text
    • https://zevofukuje.weebly.com/uploads/1/3/4/5/134585027/mapadawitisokarapixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462678/normal_60089b76ea1b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410013/normal_5ffbac8330b5a.pdfIn PDF document text
    • https://palekamenagogu.weebly.com/uploads/1/3/2/6/132682235/nuvetegelozolamip.pdfIn PDF document text
    • https://mejoraxu.weebly.com/uploads/1/3/1/3/131380998/29c1cf78a59d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465262/normal_60039eb21e2df.pdfIn PDF document text
    • http://verezitabel.66ghz.com/51978542366.pdfIn PDF document text
    • http://nevozepamuj.iblogger.org/74685524410.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://xolemobubusosi.rf.gd/92659155495.pdfIn PDF document text
    • http://paporoj.rf.gd/2716243132.pdfIn PDF document text
    • http://sonogobujajeva.rf.gd/bulliya_da_hasa_tera_song_guru.pdfIn PDF document text
    • http://bakenexiradofo.epizy.com/deploy_azure_function_app_using_arm_template.pdfIn PDF document text
    • http://misugivunuzu.epizy.com/kibebegoxukemezi.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/98774965579.pdfIn PDF document text
    • http://woxepakaj.epizy.com/apologia_chemistry_3rd_edition_test_answers.pdfIn PDF document text
    • http://ruvatarojamun.rf.gd/fawowibagovunudiboxupa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10310 4944 bytes
SHA-256: a2b39df3608dcb21d6920894fc03a59bbfb06e87b3bc81f4bddb92aae9423e94
font_01_sfnt_off000113f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F2 10700 bytes
SHA-256: 9adc64f4bc1397d930d4fed524048c747d1fe777b319fa444f3c46ca8e4c0f4b
font_02_sfnt_off00013889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13889 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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