Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba5bd04f14c3f8d…

MALICIOUS

PDF

75.8 KB Created: 2021-03-09 11:05:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ac16caf6cf57c8b0a2d4f0c3b564ae11 SHA-1: 941c5396c26f24c2f9101fa9c7f11d5c479a4066 SHA-256: fba5bd04f14c3f8dd31d4d868203be7e64cdce689934164297c900169c18549b
186 Risk Score

Malware Insights

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

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 0.9956

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://soxebez.ru/award?keyword=l+arm%25C3%25A9e+du+salut+abdellah+taia+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380881/normal_60149023e015f.pdfIn PDF document text
    • https://zajevikafe.weebly.com/uploads/1/3/5/2/135297545/58048696afa7.pdfIn PDF document text
    • https://galatusizafo.weebly.com/uploads/1/3/4/8/134884417/xofuzelow.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/nedikinapob_wizin_pamenewasozebi_zosavugutexibod.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/788cecd0fa62.pdfIn PDF document text
    • https://xitipirobopu.weebly.com/uploads/1/3/0/8/130813988/6368610.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/davufujejowon.pdfIn PDF document text
    • https://pupuzufasu.weebly.com/uploads/1/3/4/7/134759867/23c3cb33dc.pdfIn PDF document text
    • https://vowagogo.weebly.com/uploads/1/3/5/3/135307183/8179199.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486748/normal_6003d7daf335e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466676/normal_600a3b5dadf27.pdfIn PDF document text
    • https://bopamoverera.weebly.com/uploads/1/3/1/4/131408256/9463005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458827/normal_602f5d489a748.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/lizuseguwix/can_i_use_an_apple_airport_express_to_extend_my_network.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e107d291-8ea9-4761-ada6-06210f40ad2d/61427849704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b5e9756-a012-4e98-b775-5ce55070cf84/pikuzosadi.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/hayward_pool_filter_multiport_valve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8fc6e7a-b068-4f0a-90e0-ebb3d5eb7626/fe_handbook_10.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d80d300-e320-40a8-bc1f-76bde4c752b7/tesudivabivukuleseza.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/lewazipemenoronebifenidov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1573b106-4466-4385-b48c-a797fd3b399d/what_year_is_my_clark_forklift.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e2ebd9c-5256-41a8-a384-6daf7f444494/tecnicas_e_instrumentos_de_recoleccion_de_datos_segun_autores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76504fad-375c-4828-91e8-be742f59c69b/laxubewodaduvojekerefag.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/microsoft_office_business_plan_template_powerpoint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2078582-346c-400e-b93f-505f9bb53802/vermont_castings_defiant_1945_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21cac9c7-ac95-4237-bad1-6fa47412ea7d/nptel_online_course_finite_element_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a9d5ef-d2f6-40fc-b603-59877bbd45a4/tomimumujexu.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_off0000e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 5504 bytes
SHA-256: 58617db2c5d9fe988f08a5d8f976a21e1a835a76f715eac3b461dbc4b90dc7be
font_01_sfnt_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 12144 bytes
SHA-256: b0d88c291b3e19e3f6a55cc67e12683d5bd401f03367cab5e87847596cb3898e