Malicious PDF — malware analysis report

Static analysis result for SHA-256 016c1eb2618e92a6…

MALICIOUS

PDF

75.9 KB Created: 2021-03-14 13:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 056277ec8f90293fdf03fd76aa4424c8 SHA-1: 8610658616bd37e3483e2ac2c4c9c407076293ef SHA-256: 016c1eb2618e92a63751a2260e1f7c0d2f53e8816285091af8c0f0523e7224fd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to domains associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://dugedepap.ru/wix?keyword=braeburn+thermostat+3000+troubleshooting PDF link annotation
    • http://fabujisaw.mygamesonline.org/sirewazowitan.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/50369278770.pdfIn PDF document text
    • http://pezesukuju.iblogger.org/phonics_assessment_free_printable.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366984/normal_5fc5ce7bc38c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5fda923daac1a.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/sitivoravagovuweja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_4f0759ef1fe74cdb9aca98398e0a98a1.pdf?index=trueIn PDF document text
    • http://wilurimidolajej.rf.gd/neil_degrasse_tyson_ice_age_character.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d16244a-086f-43d3-b09b-3b0e89c1b56e/femofu.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_48686f33b4f5431da3a6fb1f222ea412.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a22e037-eeca-4e1d-a5b1-136d39a01552/graphic_design_courses_in_pune_camp.pdfIn PDF document text
    • http://woxanegerofokox.rf.gd/30979997038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a06e85-3b21-49a2-b32a-23dab12fc3a5/jeppesen_private_pilot_test_guide_download.pdfIn PDF document text
    • http://lubesugoninop.epizy.com/18605621739.pdfIn PDF document text
    • http://moretavumafoge.epizy.com/code_org_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/663ca70b-dab4-410b-85c4-d13f58e8c580/blue_jackets_manual_24th_edition.pdfIn PDF document text
    • http://gefureguk.epizy.com/how_to_make_a_vocabulary_notebook.pdfIn PDF document text
    • http://nubibubimalepik.atwebpages.com/sherlock_holmes_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c75d33d7-a5c1-45a5-92f2-4285f1522320/sat_vocabulary_list_2019.pdfIn PDF document text
    • http://sabepusejoponi.epizy.com/business_intelligence_and_data_science.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_off0000ea67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA67 5596 bytes
SHA-256: 748178cbd0818547d6a9df41dd51961a4bfafb8bc470937d092bbd469652ed80
font_01_sfnt_off0000fd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 10868 bytes
SHA-256: 874676055d40a1a828dc40870cb300e343ea1efda1011a51fe5655add3c1b60c

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