Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d554da32c6ecc7…

MALICIOUS

PDF

82.9 KB Created: 2021-04-08 21:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ead726625f76bd7379489916d03a033e SHA-1: 8b57448680bc5ca4363240455bcb6085f70fe647 SHA-256: d2d554da32c6ecc79d25f3a82a13088659aad1b22b17f361b26264b9183e37e1
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 0.9991

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://ponafet.ru/strik?utm_term=how+to+reset+verifone+card+reader PDF link annotation
    • https://cdn.sqhk.co/fojupigek/MUrVgef/40381456232.pdfIn PDF document text
    • http://devigebogubiret.getenjoyment.net/canaletas_para_cables_de_red.pdfIn PDF document text
    • http://jirusulixozome.scienceontheweb.net/laginuwixoxuzerivilomuku.pdfIn PDF document text
    • https://mubasaji.weebly.com/uploads/1/3/4/8/134846322/6722037.pdfIn PDF document text
    • https://wipedevibenisi.weebly.com/uploads/1/3/5/3/135315865/9980529.pdfIn PDF document text
    • http://javifimawa.mygamesonline.org/webpage_to_chrome_extension.pdfIn PDF document text
    • https://susokeruno.weebly.com/uploads/1/3/4/6/134656617/gaxibomidasod-pejezuzadatefo-nimexosemujem.pdfIn PDF document text
    • https://rusizugijenu.weebly.com/uploads/1/3/4/3/134340450/5458966.pdfIn PDF document text
    • http://kopaburak.sportsontheweb.net/13853149554.pdfIn PDF document text
    • http://gixitetopes.scienceontheweb.net/neumonia_nosocomial_pediatria_2020.pdfIn PDF document text
    • http://zugobopepoj.sportsontheweb.net/dada_almanach.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/bM74diQ/pitbull_dog_breed.pdfIn PDF document text
    • http://ranebixulukaku.iblogger.org/zeridumuxatanemesofev.pdfIn PDF document text
    • http://fobexugelego.getenjoyment.net/assinar_com_certificado_digital_c.pdfIn PDF document text
    • http://gareduli.22web.org/parabola_equation_worksheet.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/minecraft_combat_handbook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogosugo.onlinewebshop.net/spatial_statistical_data_analysis_for_gis_users.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ad199b-b824-4e7a-b511-8e508a50ecc8/tesidigode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5f3897b-9a43-4808-9ac6-2e3e943c17f1/made_to_stick_book_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/611766bf-559c-406e-a826-873de078def5/peter_and_wendy_2015_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6fffa7-32ce-43da-b81d-52639dcd0fc0/86773458442.pdfIn PDF document text
    • http://puzufowos.epizy.com/78381787052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b599e173-e339-4fbf-bf12-f039020d88b2/20960224386.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 5096 bytes
SHA-256: 8985026885aa73fe2018b3c1518d07ec8c62da197d9633f5e9aed94daf573afd
font_01_sfnt_off0000fd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9A 12588 bytes
SHA-256: 8077ac8873dc040bd2d11bef4fdaeea62703be95616a7659aae08931113c825c
font_02_sfnt_off000128b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B9 16072 bytes
SHA-256: 5daa2859ac1cba10c019d93b3654b7392607614b218f12f6681e5ae5f126ae4f