Malicious PDF — malware analysis report

Static analysis result for SHA-256 5587967091eee77a…

MALICIOUS

PDF

80.7 KB Created: 2021-03-15 06:19:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d237e40bb43f31f5743a9d727c6cdf1 SHA-1: 5217e3805173f4bbbb48557e2d3a0075b0ab82d2 SHA-256: 5587967091eee77a99ceb48bce4daa29ac3026ff0c8718212da40f780edc377e
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9998

Heuristics 4

  • 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://zajinet.ru/123?utm_term=chocolate+movie++2005 PDF link annotation
    • http://bavimobuxadu.medianewsonline.com/purekifaluzazugumafut.pdfIn PDF document text
    • https://lokevevivepino.weebly.com/uploads/1/3/4/1/134131736/ba410bbd42c.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/bcb4e571ed812.pdfIn PDF document text
    • http://mefazezotaw.22web.org/27192433480.pdfIn PDF document text
    • https://lijokojojet.weebly.com/uploads/1/3/5/3/135333606/dufafejiw_bisifirow_mivugiwepemo_kotutivamu.pdfIn PDF document text
    • http://sipoxamux.22web.org/editor_a_word_online_gratis.pdfIn PDF document text
    • http://pojesuwemi.iblogger.org/ciencias_formales_y_empiricas_ejemplos.pdfIn PDF document text
    • https://nuzalegexokoz.weebly.com/uploads/1/3/0/8/130814177/tavurediwar-maputanega.pdfIn PDF document text
    • https://tobalewaluwe.weebly.com/uploads/1/3/4/4/134437424/75051022b83fe.pdfIn PDF document text
    • http://sijiwepi.mypressonline.com/18155888056.pdfIn PDF document text
    • http://fakaluwu.scienceontheweb.net/captured_by_raiders.pdfIn PDF document text
    • https://guxipalun.weebly.com/uploads/1/3/1/8/131857363/512278.pdfIn PDF document text
    • http://sokokusulamubi.22web.org/masones_comuneros_y_carbonarios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://situwosase.myartsonline.com/what_is_the_constant_r_in_the_ideal_gas_law.pdfIn PDF document text
    • http://zagupijalixi.myartsonline.com/hp_elitedesk_800_g1_ram_upgrade.pdfIn PDF document text
    • http://palalujopaxuv.epizy.com/award_winning_powerpoint_presentation_templates.pdfIn PDF document text
    • http://soreras.epizy.com/92883815053.pdfIn PDF document text
    • http://wugerubuvugox.myartsonline.com/manual_autocad_2020_portugues.pdfIn PDF document text
    • http://nepejalaziba.rf.gd/79428722053.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_off0000e7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A5 5128 bytes
SHA-256: 52a97c8b446c777ea56e8dee19da7610ee8ae2227239b34b1d9d96f6bcb8edeb
font_01_sfnt_off0000f8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FE 11420 bytes
SHA-256: d38bdd9b25374d873f1f419607a8a2538eedda5b0446566de2447bd1facbf06a
font_02_sfnt_off00012006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12006 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6