Malicious PDF — malware analysis report

Static analysis result for SHA-256 736d9fca84782e22…

MALICIOUS

PDF

70.9 KB Created: 2021-02-25 15:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6876ba5c550c066a34be6d0bed3cb6b2 SHA-1: d2e3d64a0d04cbdb09d28a835cedf9c88c8fe59b SHA-256: 736d9fca84782e2265b704660917527941a9549fb51fe26053b1946d2e2255f5
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jacksth.ru/aws?utm_term=xbox+360+update+error+code+445e PDF link annotation
    • http://naturalm.space/23673236875edz4o.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/nirekuxofazavawojai5r2c.pdfIn PDF document text
    • http://sevulow.22web.org/report_hierarchical_linear_regression_apa.pdfIn PDF document text
    • http://reactivascotia2020.com/brick_and_mortar_vs_onlinevogpg.pdfIn PDF document text
    • http://geekcods.com/69165416819oo94i.pdfIn PDF document text
    • http://gupozatu.22web.org/reported_speech_questions_worksheet.pdfIn PDF document text
    • http://chambre.xyz/how_to_run_python_program_in_cmd_linuxwc74y.pdfIn PDF document text
    • http://menavuselixeba.iblogger.org/27214195924.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/gowakikumabobijixijuvaba00n.pdfIn macro / runtime command snippet
    • http://menavuselixeba.iblogger.org/272141In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ponuruv.rf.gd/dragon_city_breeding_sanctuary_level_2_guide.pdfIn PDF document text
    • http://dadusuxu.rf.gd/gawutolojomowubonesuxevog.pdfIn PDF document text
    • http://jetojepebonolo.epizy.com/848084495.pdfIn PDF document text
    • http://fererugame.epizy.com/fatanazojozenikebot.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/wizard_of_legend_spell_guide.pdfIn macro / runtime command snippet
    • http://gumuwojurigab.epizy.com/pemifojomemoliku.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD801 5716 bytes
SHA-256: 9bd481342816d9f00d67731d46463bff6f5bb92667e246d057e352fd3081c737
font_01_sfnt_off0000eb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 10308 bytes
SHA-256: 04d652666ec42040426ecfbe8c012588b69241cf605b0f7f89de28f5bd7ce13f