Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e99c18cc6cf69d…

MALICIOUS

PDF

77.0 KB Created: 2021-04-09 10:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1b5739d8b83c07ee555860e25e5312ee SHA-1: 62575c789993d334bd9ffcce185b303f146648e7 SHA-256: a7e99c18cc6cf69df71eb9edb6b62912d5de806a77a90a1e9eb4fe9ddd5f295a
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://dafemum.ru/strik?utm_term=sh+script+while+loop+example'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of malicious URLs suggests the document is designed to lure users to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/strik?utm_term=sh+script+while+loop+example In PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/electronics_symbols_and_functions.pdfIn PDF document text
    • http://lixebafevoku.mypressonline.com/mecanismo_de_accion_de_los_anticoagulantes.pdfIn PDF document text
    • http://fb-copyright-help-from.com/audio_libro_harry_potter_y_la_piedra_filosofal_en_inglesjljad.pdfIn PDF document text
    • http://torchland.xyz/roomba_655_battery_replacementf94mf.pdfIn PDF document text
    • http://sexesex.site/how_to_use_ergobaby_360_with_newborn_insert3f6sp.pdfIn PDF document text
    • http://dotenipago.medianewsonline.com/40886532671.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/tiveserupari.pdfIn PDF document text
    • http://navalny.design/download_wheelie_challenge_mod_apk_android_1y8pya.pdfIn PDF document text
    • http://birixuxewazotaz.mywebcommunity.org/bronkitis_dewasa.pdfIn PDF document text
    • http://kagaromorin.medianewsonline.com/canadian_visa_application_form_trinidad.pdfIn PDF document text
    • http://kfcrabota.ru/how_to_clear_memory_on_casio_calculator_fx-82auyh7hg.pdfIn PDF document text
    • http://sewonmedix.ru/what_does_schatzi_mean_in_frenchiq0vm.pdfIn PDF document text
    • http://itawegan.space/my_maths_cosine_rule_answersti7x0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/bdo_musa_awakening_quest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/what_is_cibola_burn.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/tevotagu.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/5741212625.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/qualitative_vs_quantitative_research_methods_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/7644328022.pdfIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/u_verse_s10-s1_remote_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/62027028984.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/ca_ipcc_nov_2019_exam_date_sheet.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/kirby_heritage_ii_vacuum_bags.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/cable_fly_form.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_off0000ebed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 5436 bytes
SHA-256: 24dc7b52aa9df84600ab869fa72ef33d48d530fd75f136d5b1993cf86e1ac894
font_01_sfnt_off0000fe59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE59 11892 bytes
SHA-256: d12c420af5d119f615ad1bb4e8cf8e8294a369cc2eea737eb55ba8d597b87f3d

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