Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba38d70210c4665…

MALICIOUS

PDF

69.1 KB Created: 2021-03-29 19:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5e45fb9b0bdc8789ffc55c4809802b12 SHA-1: 6b2f337d8e2a3c3125854286d2c7e14e080b6309 SHA-256: 2ba38d70210c4665a5f9989882b93c146cdf5faf3649fc1067a4cee8548b3a99
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to manipulate search engine results or direct users to malicious content. The embedded document body appears to be garbled, but the presence of URLs and the heuristic findings strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=samsung+ssg-3300gr+manual PDF link annotation
    • https://sebinegovana.weebly.com/uploads/1/3/4/0/134095930/a9dcf.pdfIn PDF document text
    • https://kabijibijeg.weebly.com/uploads/1/3/4/9/134900291/43f4c40dcc36.pdfIn PDF document text
    • http://xepujen.iblogger.org/bio_data_resume_format.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/4088669.pdfIn PDF document text
    • http://zezomaxijuduj.22web.org/best_powerpoint_slide_templates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lewimidofi.epizy.com/nufititekigosapujukitatu.pdfIn PDF document text
    • http://totaraxidob.rf.gd/centrales_termoelctricas_de_biomasa_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d48b62a-1188-4605-b20b-28100bf3eef7/wepumaniga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38de6fbd-fefe-489a-a9b2-012cedee7fd6/62766939865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a2960c-ba33-4f66-91b3-2381e024a83b/15170268561.pdfIn PDF document text
    • http://furosusuz.epizy.com/are_the_lord_of_the_rings_movies_on_a_streaming_service.pdfIn PDF document text
    • http://tesunujazo.epizy.com/allahabad_weather_report_weekly.pdfIn PDF document text
    • http://filubukuwewe.epizy.com/meaning_of_performance_budget_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0fa3e2c-61cd-4189-bd19-b3c62cce87cc/xuwomibuwofawerowabu.pdfIn PDF document text
    • http://xolomen.epizy.com/vajeludaximub.pdfIn PDF document text
    • http://posesesu.epizy.com/student_record_management_system_project_ppt.pdfIn PDF document text
    • http://bevowamudad.epizy.com/skunk_anansie_hedonism_guitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2071ebae-d78a-4b92-874e-ea3a1beaf978/wironobanovef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c82269-2b62-4eeb-8d8d-04fbe93a7577/44373534575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/272c236c-1b6d-438d-b7ff-eff554e31964/58175190225.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_off0000d0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D9 5444 bytes
SHA-256: 6ca83224c56f3c2687aa82cbcdbd3a9ee81f320a2f211127c9f32559a1f6b1fb
font_01_sfnt_off0000e348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE348 10484 bytes
SHA-256: 754a837abc09a995322341dffb4bf9b8d8e37a35a75c668ac6b0d8b69e220e99