Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae0e09120b22137…

MALICIOUS

PDF

76.9 KB Created: 2021-04-13 18:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4f49913607f2c5e6c8e77387dc5a2e76 SHA-1: d464c65ae705e08dde948807ba9a440fcb1df23b SHA-256: eae0e09120b2213738a9adc47a3c0b0f26fac29cf1aee38c854fe32ca74faa15
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 0.9998

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://maypoin.ru/strik?utm_term=how+strict+are+treadmill+weight+limits PDF link annotation
    • http://towuxubi.22web.org/rakotufenalemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413458/normal_600f1b3832c64.pdfIn PDF document text
    • http://kizidotiz.iblogger.org/bushnell_v3_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381321/normal_5ff899b9a5efe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465262/normal_6057b7330e15c.pdfIn PDF document text
    • http://nigasheff.xyz/plan_de_meuble_en_bois_gratuit7inqc.pdfIn PDF document text
    • http://gotuxeloso.22web.org/koduxozowa.pdfIn PDF document text
    • http://pomanonorajalam.22web.org/blue_devils_dci_2019_uniforms.pdfIn PDF document text
    • http://copyrighytsupport.com/44868880406l17d9.pdfIn PDF document text
    • http://good-production17.site/washington_dc_news_national_guard6c632.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/management_of_abdominal_compartment_syndrome.pdfIn PDF document text
    • http://jamurujitexezi.epizy.com/17285246461.pdfIn PDF document text
    • http://poxemibusap.epizy.com/pdf_file_converter_to_excel.pdfIn PDF document text
    • http://fepaseweg.epizy.com/wavurenudoni.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/nimurono.pdfIn PDF document text
    • http://zepurudevivo.rf.gd/bluetooth_free_for_laptop_windows_7.pdfIn PDF document text
    • http://lotezogakore.rf.gd/terafixegesababapisuguwaz.pdfIn PDF document text
    • http://koraxirimaxodet.epizy.com/93259448414.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/surah_mulk_benefits_in_hindi.pdfIn PDF document text
    • http://vodevufitawik.rf.gd/vizexuxoxudenerewoteze.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_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 5408 bytes
SHA-256: 3f7a3ca8773c8f6138620d0a0bf8ae7d46727abb5cf3ac4fdfe5e60d53f772b5
font_01_sfnt_off0001014f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014F 10808 bytes
SHA-256: 1dc4029d6dfe94405fee61fc0cdf14d95291f7aed272e99bb45b5ced62764136