Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf06b127a82a292…

MALICIOUS

PDF

80.6 KB Created: 2021-03-06 23:58:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3c331cc59d4e7816584868ec2c1007bc SHA-1: 271193e767c216d9ed4b089379d673a73100a334 SHA-256: 5bf06b127a82a2923a7a10ad05f72ca2458b38e7194a1f5c62f03f278033af10
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and detected as malicious by ClamAV and an ML classifier. It contains numerous external links, including one to `https://mezovuduw.ru/strik?utm_term=tipos+de+sistema+de+informacion+gerencial`, suggesting a phishing or SEO manipulation attempt. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common vector for malicious PDF exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://mezovuduw.ru/strik?utm_term=tipos+de+sistema+de+informacion+gerencial PDF link annotation
    • http://zovanatul.iblogger.org/movies_in_tamilrockers._net.pdfIn PDF document text
    • http://nagupenaxija.iblogger.org/baldur_s_gate_enhanced_edition_latest_patch.pdfIn PDF document text
    • http://rovebagilin.22web.org/rugakakuzugofunot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b71c4479-4655-4573-afa8-0700e5786237/bosch_ecosense_dishwasher_turn_off_beep.pdfIn PDF document text
    • http://nokarox.rf.gd/cerebellar_examination.pdfIn PDF document text
    • http://kekogixo.epizy.com/69353069556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f535c8b3-9a8e-4653-ae5e-c70578c0a11a/a_christmas_prince_the_royal_baby_full_movie_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f45402b-2cea-41dd-ba45-b3d58e93b19b/dozekin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d52f4f-06ff-4c1b-958b-b547055dd553/putulotelebivenerise.pdfIn PDF document text
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_2409ecd33bb544868085f373a722111e.pdf?index=trueIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_57f9427d4d714c718178553c32eb2bf5.pdf?index=trueIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_7de2caa971ea452389c40822e77368ec.pdf?index=trueIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_a56241f89f254850b34f97e7d201c753.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c81c68-da93-41ba-aeea-ce87c7cc2143/cules_son_las_enfermedades_ms_comunes_del_estmago.pdfIn PDF document text
    • http://ferovugosewago.epizy.com/79185045603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd02082-36d0-42dc-84da-87beaeb22255/61557126370.pdfIn PDF document text
    • http://setavafajo.epizy.com/harry_potter_und_der_stein_der_weisen_buch_erscheinungsjahr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b751dd-2bdd-42d2-b9a3-c650d8a722d2/vokelexi.pdfIn PDF document text
    • http://buwanizun.epizy.com/capezio_ballet_shoes_sizing_guide.pdfIn PDF document text
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_352f32add4b54850b03bbfb15989d232.pdf?index=trueIn PDF document text
    • http://filogipopema.epizy.com/xofibobenilurux.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_off0000fb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 5424 bytes
SHA-256: ac560f5e4da503e258056a2c1783c31efe015db4b245f48f3c15fb82db7f14c9
font_01_sfnt_off00010dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 11744 bytes
SHA-256: b7577783e7363de3bfd0fbd0697aefecec33a36e1f14309ad0b0895c05fdbc22