Malicious PDF — malware analysis report

Static analysis result for SHA-256 49558a36e7e6619b…

MALICIOUS

PDF

68.7 KB Created: 2021-03-23 12:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 202315615d3b44d1dc76806650eff3ff SHA-1: 4a05ac294bf6ef2f7151369718aebfb3f8304421 SHA-256: 49558a36e7e6619bcc3e3f9d5c21952c2ecd54ccbd20f09e14ad09e5855ebe18
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The embedded content, though obfuscated, hints at a lure related to 'Us navy uic finder'. ClamAV and ML classifiers strongly indicate maliciousness, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/aws?utm_term=us+navy+uic+finder PDF link annotation
    • http://topcreditmonitoring.info/53326111043a3g0g.pdfIn PDF document text
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/wasagigiri-xoduremumifagik-runezutemovefu-jozaka.pdfIn PDF document text
    • http://flylovel.com/ejemplo_de_un_memorando_multipleb2mc6.pdfIn PDF document text
    • https://voromelub.weebly.com/uploads/1/3/4/8/134872571/1632457.pdfIn PDF document text
    • https://sawifotu.weebly.com/uploads/1/3/4/5/134597463/dedij-fenufikuvab-karubumibepis.pdfIn PDF document text
    • https://nedamekiwuj.weebly.com/uploads/1/3/1/3/131379605/8313115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450896/normal_602188e82e0a2.pdfIn PDF document text
    • https://noromilo.weebly.com/uploads/1/3/4/5/134587763/vopuxixo.pdfIn PDF document text
    • https://guxizipib.weebly.com/uploads/1/3/4/3/134367178/guwowowesalusu-xonibumetoluj-nukefedadok-sojexawonojir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505839/normal_5fdc7aeab404f.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/b6e0ea64b269beb.pdfIn PDF document text
    • https://lesezisuwo.weebly.com/uploads/1/3/4/1/134109364/83753c65189e91.pdfIn PDF document text
    • http://kolomata.ru/serta_motion_perfect_adjustable_base_manualu99r6.pdfIn PDF document text
    • https://tidatulo.weebly.com/uploads/1/3/2/8/132815220/zopadozid-kegobelulujivu-lufip-xopatakigamif.pdfIn PDF document text
    • http://balifruit.com/augustine_confessions_summary_book_2ennq9.pdfIn PDF document text
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/karatu.pdfIn PDF document text
    • https://xovixonu.weebly.com/uploads/1/3/4/8/134896571/nibilebatovato.pdfIn PDF document text
    • http://hookup671.site/30020072014wgwm6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/30d10a67-57f2-4292-85a2-c3ab5079071a/uscg_marine_safety_alert_04-20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fe6504-7ccf-4598-8b01-337a9138719e/walgreens_infrared_instant_ear_digital_thermometer_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0354e1d-2502-407f-b131-8d913add7912/28614538020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC521 4828 bytes
SHA-256: e297dd7cbfe53daffdcc172fda8c3a2ca5d5789ff2aac47dea0e7c795f3f943a
font_01_sfnt_off0000d593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD593 10004 bytes
SHA-256: 5780a095141ded44cd3883c9d6b31f5c0e8f5eedfc58dc72033d7a142748e547
font_02_sfnt_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f