Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9f3e20acaeeb5c…

MALICIOUS

PDF

84.3 KB Created: 2021-05-11 10:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9f58b21d7c6283915a8f0e24d76953ad SHA-1: 11e5292301763db2b664e5c9ad3b574fc4b17200 SHA-256: db9f3e20acaeeb5c0063aabd83dbc402e6767aff35d78cb593985b69beadc08d
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 0.9997

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://lozipotod.ru/strik?utm_term=sword+art+online+ps+vita+games+in+order PDF link annotation
    • http://tijudiwulewanuw.getenjoyment.net/maxavek.pdfIn PDF document text
    • http://ninuxalezopo.getenjoyment.net/6409001879.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/eccentric_reducer_dimensions.pdfIn PDF document text
    • https://siwevamad.weebly.com/uploads/1/3/1/8/131871433/gawiget-tilalewiwaz-boropapudexa.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/jaMP3jc/35912362199.pdfIn PDF document text
    • http://toxusuzom.mypressonline.com/zifiwemakitedigoji.pdfIn PDF document text
    • http://kufudizaja.22web.org/2622587940.pdfIn PDF document text
    • https://cdn.sqhk.co/buwozumu/gYZiazb/c_template_function_pointer_type.pdfIn PDF document text
    • https://zonilalafujagep.weebly.com/uploads/1/3/4/7/134731182/b7e0ebd.pdfIn PDF document text
    • http://jakesubinosol.scienceontheweb.net/abandoned_farmhouse_ted_kooser.pdfIn PDF document text
    • http://merotudonor.mypressonline.com/equidad_de_genero_en_el_deporte.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/YVD4CDa/allegiant_flights_bismarck_to_las_vegas.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/1886814.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/HgjtXha/52095784445.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://sadoboxijowem.myartsonline.com/computer_capsule_for_ibps_po.pdfIn PDF document text
    • http://wodelava.rf.gd/jonexozuwer.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/representational_state_transfer_rest.pdfIn PDF document text
    • http://mivurukelino.onlinewebshop.net/36045339606.pdfIn PDF document text
    • http://zezevefo.rf.gd/aberturas_de_xadrez_para_leigos_completo.pdfIn PDF document text
    • http://kapugekemasili.rf.gd/hitos_de_la_tecnologia_educativa.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_off0000fe1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1C 5324 bytes
SHA-256: edead664985cdd14e229f0efdf17fd2794fdf5317602f616eea2dda554046dbb
font_01_sfnt_off0001102c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102C 10516 bytes
SHA-256: fc3c75f59449bf5343f8593fb80f154a8063486de4a65ca967da4208f6bec51a
font_02_sfnt_off0001340f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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