Malicious PDF — malware analysis report

Static analysis result for SHA-256 02625af2108ab856…

MALICIOUS

PDF

87.3 KB Created: 2021-03-24 21:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 43818575235c631441e462ead8f0710f SHA-1: b7e51e386d396ca92f786c29efb5dc23b197d218 SHA-256: 02625af2108ab856954b2b594399b6ebbb4bca4c3331de9a7725e25784292586
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent example being `https://botokaw.ru/123?utm_term=bulawa+mujhe+aaj+teri+galiyan+song`. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of multiple external links points towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=bulawa+mujhe+aaj+teri+galiyan+song PDF link annotation
    • http://dodajavux.scienceontheweb.net/non_benzenoid_compounds.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/xopikisela.pdfIn PDF document text
    • http://eslife.pro/31488226767as0h9.pdfIn PDF document text
    • http://salimom.mygamesonline.org/el_sonido_y_sus_cualidades.pdfIn PDF document text
    • http://wojournal.ru/what_is_geocentric_theory_used_forjqbj7.pdfIn PDF document text
    • http://jinokonur.22web.org/xivenuxe.pdfIn PDF document text
    • http://nopezimugabotik.mygamesonline.org/tubiku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://nusilemil.epizy.com/91900478347.pdfIn PDF document text
    • http://netozovozuze.rf.gd/forujukodiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cbbe57d-6668-4a60-8b2a-7174c181062e/how_do_you_qualify_for_the_tennessee_hope_scholarship.pdfIn PDF document text
    • http://mekuroxowu.epizy.com/dasapulugaxovotos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e27f4e-e1a2-4524-a548-8109351a7b14/dukudatugisawarozuruf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4b9e94-65b0-4a4d-b93e-4671a62b59e0/where_is_the_drain_filter_on_a_lg_washing_machine.pdfIn PDF document text
    • http://xafibejijopo.atwebpages.com/sakamoraguliwunumimogi.pdfIn PDF document text
    • http://vuzogumav.rf.gd/29287815138.pdfIn PDF document text
    • http://nozozuwovore.atwebpages.com/vusurelidoxereguresipeje.pdfIn PDF document text
    • http://sofibimibojas.myartsonline.com/demajuranugo.pdfIn PDF document text
    • http://kipazafar.atwebpages.com/contoh_soal_medan_listrik.pdfIn PDF document text
    • http://zoligagomuwe.onlinewebshop.net/82771753569.pdfIn PDF document text
    • http://dozipebijegubig.epizy.com/amplitude_shift_keying.pdfIn PDF document text
    • http://sodividupoz.epizy.com/97059250425.pdfIn PDF document text
    • http://dikekonigexixa.epizy.com/menafaregapegivopepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a232ab2b-3d30-4d62-a4c6-6b26aff35dda/hp_officejet_pro_8615_e-all-in-one_printer_manual.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_off0000fbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCA 5420 bytes
SHA-256: 477c999394b8f91a3a212c108e9808d843f7c6dd464585141457dbfd2e4d07e0
font_01_sfnt_off00010e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E27 10056 bytes
SHA-256: eb33094d890aa985926fa0455a993c75d19e28dc078913bfe14276f832b9405b
font_02_sfnt_off000130c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C3 9796 bytes
SHA-256: 153c1cbccc7292a6e7e6172f420ce12036373ec4da914ff74eb1ed851a70169e