Malicious PDF — malware analysis report

Static analysis result for SHA-256 97318f9528a92b00…

MALICIOUS

PDF

83.0 KB Created: 2021-04-15 07:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2a994c7378ac00ec731a72f49ac319e8 SHA-1: 2152a8156d242f15cde351429d0668bbd9683ebc SHA-256: 97318f9528a92b00f04c66895b31544e69c226093e1b361ff26fd40dc96828ad
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://lozipotod.ru/strik?utm_term=los+mejores+cursos+de+ingles+en+linea+en+mexico PDF link annotation
    • http://igonlinesupport.com/sabrina_claudio_belong_to_you_freex7cgg.pdfIn PDF document text
    • http://nasporte1.fun/apa_6th_edition_article_critique_formatkfyu1.pdfIn PDF document text
    • http://tokidijafa.22web.org/kenya_budget_2020.pdfIn PDF document text
    • http://tarizuxewibob.22web.org/diode_bridge_rectifier_waveform.pdfIn PDF document text
    • http://ionatr.fun/hwy_10_traffic_report3u100.pdfIn PDF document text
    • http://br1.red/dotugobakikosageperesi6eyo.pdfIn PDF document text
    • http://idealicaitaly.site/wd_my_passport_ultra_2tb_price_in_india3bupg.pdfIn PDF document text
    • http://vijoxufomodazug.22web.org/22216998768.pdfIn PDF document text
    • http://goproonly.com/irulu_x7_tablet_hard_reseta2rvv.pdfIn PDF document text
    • http://delayikapy.xyz/1st_grade_math_standards_ohioqcnko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sujetokotew.rf.gd/mamebofesoborifu.pdfIn PDF document text
    • http://dinotowiteve.rf.gd/kijim.pdfIn PDF document text
    • http://batogejupimole.rf.gd/vofogopujapi.pdfIn PDF document text
    • http://pulaxemafuzizum.epizy.com/arbschg_2020.pdfIn PDF document text
    • http://wasalesex.epizy.com/genetics_vocabulary_worksheet.pdfIn PDF document text
    • http://puvejuf.epizy.com/1877078676.pdfIn PDF document text
    • http://rekobive.epizy.com/abandono_idoso.pdfIn PDF document text
    • http://jafimelivif.rf.gd/41327393078.pdfIn PDF document text
    • http://novotufimaxanu.epizy.com/masaru.pdfIn PDF document text
    • http://xoxudexutuku.rf.gd/oxford_discover_level_2.pdfIn PDF document text
    • http://lojarine.epizy.com/renulaworaxozina.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_off0001035d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035D 5344 bytes
SHA-256: 2bc6d23f38b47d15f9509988b0f2bd29fc17703f47394d5dfad83b710570c777
font_01_sfnt_off0001157d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157D 12012 bytes
SHA-256: 79c1f0c73408281ab3386ca14fd7edf3d5fc1b073f37513c3d44bc414607105c