Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de1ae4a7b560f7a…

MALICIOUS

PDF

79.5 KB Created: 2021-04-09 06:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 14d2593d0ae1579aef5ac7888e8eb1ef SHA-1: 504492b824a17509c76edb474c2dc8089bab6607 SHA-256: 0de1ae4a7b560f7a9c7370da6060f51c7c973173e9ebf0cf0c47205015a4822a
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 0.9990

Heuristics 5

  • 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 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://vilenefex.ru/strik?utm_term=how+to+calculate+debt+to+total+assets+ratio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501233/normal_600b52f186fe2.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/228712.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/is_there_a_sequel_to_harry_potter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_5fdb00c51a77d.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/ejjygdZ/21678646301.pdfIn PDF document text
    • https://vegimeva.weebly.com/uploads/1/3/1/3/131380995/defamolologolod_jorowisibagi_siwomulegenope.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/b114f0c8b7d4.pdfIn PDF document text
    • https://govabegos.weebly.com/uploads/1/3/4/0/134018252/nakupogiwarojo-mapaxozoxibi-lutidiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368501/normal_5feb517e0c597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_601a9d51749ba.pdfIn PDF document text
    • https://cdn.sqhk.co/popaxutu/eVBjhM3/digi_top_up_free_internet.pdfIn PDF document text
    • http://jolixasij.sportsontheweb.net/72949905463.pdfIn PDF document text
    • http://namixojebeku.iblogger.org/eu4_byzantium_guide_1._25.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/bhgGig8/91348794053.pdfIn PDF document text
    • https://lomixefewagad.weebly.com/uploads/1/3/4/5/134592496/boxesobokula-fagelinikubu.pdfIn PDF document text
    • http://jobediniberine.scienceontheweb.net/37714995862.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/skin_cancer_information.pdfIn PDF document text
    • https://cdn.sqhk.co/filovixedalu/jiie64w/19361804946.pdfIn PDF document text
    • http://bivasezi.iblogger.org/escala_de_akin_y_rifle.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
    • http://ranemojak.epizy.com/85768622816.pdfIn PDF document text
    • http://nejajubuwuwo.rf.gd/guradono.pdfIn PDF document text
    • http://jifaxonajipe.rf.gd/70562844866.pdfIn PDF document text
    • http://wavedada.epizy.com/nogegarabutipumekukagu.pdfIn PDF document text
    • http://bojumimo.epizy.com/aluminium_perforated_sheet_manufacturers_in_mumbai.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_off0000e971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE971 4904 bytes
SHA-256: caff6aff630b868bb9e1e70f2979eb745651ad0ad760bb42c6d51f23c3f39a54
font_01_sfnt_off0000fa33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA33 10996 bytes
SHA-256: 57d341fc2cdaa38951bd1c3293befb3c16e7c871b787a6326e98c53cd7fa92e9
font_02_sfnt_off00011fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE7 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230