Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca1c6386e6e541a…

MALICIOUS

PDF

79.3 KB Created: 2021-05-04 10:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 31b39dc3c8e420ffdaf105ffd9ed450f SHA-1: 78ef98327bff66bc8723e2c8a9bf22321d932968 SHA-256: 1ca1c6386e6e541a3228c1ea41c3506f32bc1dea2e61edd33f638a9d7671652b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a ClamAV detection name indicating it's a phishing trojan. The PDF contains an embedded external URI pointing to 'https://botokaw.ru/strik?utm_term=clear+speech-language+pathology', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=clear+speech-language+pathology PDF link annotation
    • http://jaxixojuko.mypressonline.com/antibacterial_activity_of_flavonoids.pdfIn PDF document text
    • http://zonitupupafof.sportsontheweb.net/kingdom_management_games_pc.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/39932667772.pdfIn PDF document text
    • http://fuxutigox.mypressonline.com/bradycardia_algorithm.pdfIn PDF document text
    • http://kinerexasuxemo.getenjoyment.net/information_technology_business_plan.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/6866160589.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/rukaj.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/14284047910.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapufojutujat.atwebpages.com/daxijaxasavamovob.pdfIn PDF document text
    • http://sapimidogiraja.rf.gd/a_grief_observed_cs_lewis.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/microsoft_project_2019_for_mac.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/informatica_bdm_tutorial_point.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/sundara_kanda_kannada_movie_songs.pdfIn PDF document text
    • http://wurebosuloxu.myartsonline.com/gujarat_voting_list.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/xakitedafinut.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/20922574319.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/how_to_access_my_icloud_account_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/history_of_bond_market.pdfIn PDF document text
    • http://moferamobonar.epizy.com/4th_grade_math_addition_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/ruzufubezeriredakibuzopoj.pdfIn PDF document text
    • http://dopovis.myartsonline.com/a_discovery_of_witches_season_2_cast_list.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/blacksmith_desynthesis_guide_ffxiv.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_off0000f95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 5232 bytes
SHA-256: f818ab7e396f21214a683aacd6b210950bc835ea5e683d9fa1225966558c0405
font_01_sfnt_off00010b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B34 10836 bytes
SHA-256: 2a9ed9e59e7978fd2cc6e17f189f7a19c9a5b2a1ab53a519de888bb50c9e6d9e

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