Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8baed1aae58749…

MALICIOUS

PDF

93.7 KB Created: 2021-03-16 06:12:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0c2a30f5dedae848104d8a5e078f7c55 SHA-1: 31c2d769b5c55418d688a618296f140aab1874d5 SHA-256: ee8baed1aae5874919c91e83ad9cd1ce8c837c4cc6d36513031c5d65d7bdf101
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 0.9988

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://leonvi.ru/award?keyword=the+kartilya+ng+katipunan+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421062/normal_604b13f85fd83.pdfIn PDF document text
    • http://airet.space/the_long_goodbye_raymond_chandler_sparknoteszrvs8.pdfIn PDF document text
    • http://mavafesumej.medianewsonline.com/97466152262.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/explain_the_causes_of_down_syndrome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448984/normal_5fd0a8679f51f.pdfIn PDF document text
    • http://antonioit.fun/josil1trwc.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/effective_presentation.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/60757495127.pdfIn PDF document text
    • http://eurosett.net/xodimeziwapatvcji.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/xizuxewapaxagugitimulabm0s1z.pdfIn PDF document text
    • http://balewezekowesab.iblogger.org/55544584521.pdfIn PDF document text
    • http://megalit-korolev.ru/865840705016ewxa.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/how_to_process_unresolved_trauma.pdfIn PDF document text
    • http://prizinsta365.website/20390372136us0b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476765/normal_600c0e013e58f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450040/normal_5fe409b24ca22.pdfIn PDF document text
    • http://wonnaturila.space/building_information_modeling_course_in_germanycic7h.pdfIn PDF document text
    • http://velimafi.iblogger.org/67458894669.pdfIn PDF document text
    • http://spoonnumberone.xyz/physics_for_scientist_and_engineerso9p1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486997/normal_5fcdff21637b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kubowulurarekij.myartsonline.com/perilorometunoloxata.pdfIn PDF document text
    • http://feramivo.rf.gd/51878915791.pdfIn PDF document text
    • http://gozuketitara.onlinewebshop.net/artificial_neural_network_tutorial_for_beginners.pdfIn PDF document text
    • http://fetewuzapozoza.rf.gd/bioplastico_de_almidon_de_maiz.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/cual_es_la_mejor_biblia_catolica.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_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 16748 bytes
SHA-256: 7e87b2e490944073ede63d699556cb9f6ff9f56022d17c88847e06dbad006746
font_01_sfnt_off0001303c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303C 5240 bytes
SHA-256: cdf2a29740fa32479e8e1975a8b22ae0ed2d134515a337edf5ba6e077132f554
font_02_sfnt_off00014217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14217 11660 bytes
SHA-256: b29a81b4ebdc0e6c88f841b0a77163570603643baf0b0980670c1edec8199774