Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d45e72c86136015…

MALICIOUS

PDF

71.6 KB Created: 2021-03-17 19:49:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 79ee93a40c3e7a65b4e4d28b67ded3df SHA-1: b09931789e1cddad48ba0e5c79203384d02df8a8 SHA-256: 4d45e72c86136015491d2c201d80917c281d1e0183a354721bf4f1fae2807418
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. This suggests a phishing or scam attempt, likely to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/wix?keyword=ready+book+math+grade+7+answer+key+2017 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376372/normal_60107599d5564.pdfIn PDF document text
    • http://kewisanoxiv.66ghz.com/36073322841.pdfIn PDF document text
    • http://jidagepopisar.22web.org/jugusenuma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478716/normal_600476d51565f.pdfIn PDF document text
    • http://gurerawe.22web.org/enlace_dativo.pdfIn PDF document text
    • http://salogogudezofa.iblogger.org/carer_recognition_act_2010.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6741fe46-ea7c-4f0c-a42b-9416e423d019/ec8552_computer_architecture_and_organization_syllabus_for_ece.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7223602-a72f-4bec-b9a9-95343ca6f73a/pretty_little_liars_season_1_episode_16_recap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a68b846-e42c-4556-a328-55fbff5ee9de/judoxosipatisalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50418e98-1d7e-4a1a-baf1-39945da3adb3/confessions_of_a_shopaholic_full_movie_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f77500d-aac5-4c9c-868e-949540120f08/71037704328.pdfIn PDF document text
    • http://xidopozisawe.epizy.com/sanyo_tv_factory_reset_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03508d61-4ed3-4320-a49d-6719885aaf61/fonifixesanal.pdfIn PDF document text
    • http://dujabonesisu.rf.gd/pdf_to_word_software_mac.pdfIn PDF document text
    • http://dopoval.epizy.com/72871641945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e888f606-3695-4855-af70-bf33b1895aa3/zerilaluzalotidud.pdfIn PDF document text
    • http://virirunabeso.rf.gd/entrepreneurs_relief_formal_liquidation.pdfIn PDF document text
    • http://dukojalili.rf.gd/felewowisabezolegagu.pdfIn PDF document text
    • http://wijopimitiraze.epizy.com/adani_wilmar_limited_annual_report.pdfIn PDF document text
    • http://zuxakenupe.epizy.com/topugugemunufo.pdfIn PDF document text
    • http://vedegisawopuf.epizy.com/toefl_test_sample_questions.pdfIn PDF document text
    • http://vokerajud.epizy.com/bts_agust_d_album.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_off0000d6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C8 6016 bytes
SHA-256: 221a8955145558de2adb5b1dc38201d4568a8aabe0b23b2dcda2a17c763a33a6
font_01_sfnt_off0000eb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 10440 bytes
SHA-256: 901b85b1798aae8bf9fa548055539f4641356572247a3117ac298fb74e229440

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