Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f62e61956ab1d10…

MALICIOUS

PDF

80.5 KB Created: 2021-04-05 14:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ef291ce3a6c30e608a609946ca0467db SHA-1: 2915cb5b77acc10581fbfb7de16f9479a60f79a0 SHA-256: 7f62e61956ab1d10a67ac2ae6d552a7e8bc946d1dab2c42c14db4b87170e5803
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a construction safety manual, which is a common phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristic firings suggest the document is designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/award?keyword=occupational+health+and+safety+manual+for+construction+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409621/normal_600e05989c0ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445558/normal_5feb6a4990c4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492875/normal_60628cc65eca5.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/34987458345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_5ff0bea3301c8.pdfIn PDF document text
    • http://jusibebobekig.iblogger.org/56195133635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380540/normal_5feef315f3285.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406775/normal_5feb1340116f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453103/normal_5ff7f7e3a058a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419630/normal_5fcf8a2418e65.pdfIn PDF document text
    • http://xidufefonudug.sportsontheweb.net/kopusevoxepogor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_600df6fc5d6d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruzizasasasami.rf.gd/tejejalimuvifapabij.pdfIn PDF document text
    • http://gexabozu.epizy.com/63962040058.pdfIn PDF document text
    • http://getuvodiv.epizy.com/depth_of_knowledge_overview_chart.pdfIn PDF document text
    • http://runodeb.rf.gd/autodwg_dwg_to_converter_full_crack.pdfIn PDF document text
    • http://zisajas.epizy.com/high_school_testing_coordinator_job_description.pdfIn PDF document text
    • http://voxibamad.epizy.com/gabodinekolelapagam.pdfIn PDF document text
    • http://fowafad.epizy.com/application_of_biotechnology_in_environment.pdfIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_2e8d96c5607747cd9fb4ee4504d7a564.pdf?index=trueIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_ef38fc2f284049d4a0c8c7c766083018.pdf?index=trueIn PDF document text
    • http://sipanokule.onlinewebshop.net/69036346132.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_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 5524 bytes
SHA-256: 33926afcc1038ed4dade0eabf696a665b92b6266a92134152b990a2a32dfe27a
font_01_sfnt_off00010d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D89 11176 bytes
SHA-256: 213dd1d301f6d23eda043f3436a79abc82cde9246556e907e842890d95c85584

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