Malicious PDF — malware analysis report

Static analysis result for SHA-256 570ce48d1dd57221…

MALICIOUS

PDF

73.8 KB Created: 2021-02-27 10:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f0c4d64efb16a10591bb947453b29854 SHA-1: 78b09716e5932cf5c0799b722d623c012b35e2c4 SHA-256: 570ce48d1dd5722101a9a6cfbcfec71a9ba96d77e7718f37b4b9729649e8b10d
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominently featuring a 'utm_term' parameter suggesting a phishing or advertising lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=pokemon+base+set+booster+box+australia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452852/normal_6012c4c486aeb.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/ramimotedunol.pdfIn PDF document text
    • http://jobesagaponapa.22web.org/kendo_grid_column_html_template.pdfIn PDF document text
    • http://buzifun.22web.org/coleman_furnace_ignitor_troubleshooting.pdfIn PDF document text
    • http://nigigalewo.iblogger.org/22926626857.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/68007723285.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/ePLdxt0/shell_lubeanalyst_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rogofijanititad.epizy.com/oriya_bhajan_namita_agrawal.pdfIn PDF document text
    • http://gesuposobevexo.rf.gd/87412140274.pdfIn PDF document text
    • http://nozumipoz.epizy.com/pixewerojekomefizat.pdfIn PDF document text
    • http://jujobope.atwebpages.com/principales_problemas_sociales_y_economicos_de_mexico.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/55366748691.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/78327307454.pdfIn PDF document text
    • http://ligujizulogi.atwebpages.com/4th_grade_math_worksheets_california_standards.pdfIn PDF document text
    • http://fofeparulofiz.rf.gd/almas_gemelas_deepak_chopra.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/cuentos_de_la_selva_horacio_quiroga_las_medias_de_los_flamencos_resumen.pdfIn PDF document text
    • http://vitorozakosi.rf.gd/fetotavetanazepebaduparo.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_off0000e3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EC 5104 bytes
SHA-256: 78a3962d54edbecfd95601ab40b57bc32488c0a2847bbac3f1ed50e74723f144
font_01_sfnt_off0000f536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF536 10860 bytes
SHA-256: 604ed743a420d9693bc16d8d57fb754b9609ff8f2686ecad5851916da61780b7