Malicious PDF — malware analysis report

Static analysis result for SHA-256 87bfb75c589c15f8…

MALICIOUS

PDF

93.7 KB Created: 2021-03-22 19:30:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d376cefd1b67ce03bcfee5d26c0731b5 SHA-1: a819512202b3998baffaf4fa700be82817b6b815 SHA-256: 87bfb75c589c15f8552b4fba155e28c64228c73ccf9d26da0681c1c900852aa5
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains multiple embedded URLs, including one that appears to be a redirector for search terms, suggesting an attempt to direct users to malicious content. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/wix?keyword=fashion+show+themes+for+school PDF link annotation
    • http://nosilekexiwot.mywebcommunity.org/chicco_keyfit_car_seat_installation.pdfIn PDF document text
    • http://bazutujujetix.iblogger.org/assembly_language_history.pdfIn PDF document text
    • http://snegny.com/gupipiridodesm1q.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/jufetibivusar.pdfIn PDF document text
    • http://jarevine.mywebcommunity.org/do_you_lose_more_weight_strength_training.pdfIn PDF document text
    • http://cmb-societe.com/mesegorojozinexibitusodteoa.pdfIn PDF document text
    • http://ca-management.website/i_love_the_lord_whitneyfp30h.pdfIn PDF document text
    • http://juxoxelobonoje.22web.org/regents_chemistry_electron_configuration_worksheet_answers.pdfIn PDF document text
    • http://testersairf.xyz/146604851591zwx7.pdfIn PDF document text
    • http://springital.fun/blade_master_mini_action_rpg_gameluc5v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gefilodeza.myartsonline.com/78238544714.pdfIn PDF document text
    • http://kofuwan.epizy.com/casio_exilim_camera_12.1_megapixel_price.pdfIn PDF document text
    • http://xejarejunap.rf.gd/cyber_bullying_facts_and_information.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/vitamin_b12_metabolism.pdfIn PDF document text
    • http://nujajixunagiweb.epizy.com/attestation_employeur_particulier.pdfIn PDF document text
    • http://fuwuwiri.rf.gd/dasizalegogadab.pdfIn PDF document text
    • http://zogoxuf.atwebpages.com/enzima_aldolasa.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/tuzazuzode.pdfIn PDF document text
    • http://gixarab.rf.gd/cancer_de_esofago_tnm.pdfIn PDF document text
    • http://jemaloweveja.rf.gd/26746930128.pdfIn PDF document text
    • http://zaximibirada.epizy.com/87726098598.pdfIn PDF document text
    • http://zozedoxubemox.epizy.com/35320804248.pdfIn PDF document text
    • http://bixerexexotepe.rf.gd/48971189772.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_off000130ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AD 5168 bytes
SHA-256: c09e90fd11548dc8dec1acde1cd169dee2b3097e761261c3a46ba65ffca37cf0
font_01_sfnt_off0001422b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422B 11228 bytes
SHA-256: 31da1699d0fe3cfa4345b80bdc554fc2decd7bc04cbd240cf5e93cf0e71beb6c