Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fd50b1f529bec8…

MALICIOUS

PDF

105.3 KB Created: 2021-04-21 06:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 509070d12908e2b4ec5c35e2df66dc44 SHA-1: b8fc428db59de0ea3364365a465a45b7d187b61c SHA-256: c6fd50b1f529bec858dfb56c0485b7322e1bb5a45f3b2dc856d30d8ab155f99d
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('botokaw.ru') that is likely used for phishing or malware distribution. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to garage door openers, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://botokaw.ru/strik?utm_term=how+to+program+a+wayne+dalton+garage+door+opener+to+a+car PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393346/normal_60309eb540e13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403140/normal_603f4b2844cc8.pdfIn PDF document text
    • http://sezituza.66ghz.com/84858873426.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/understanding_and_using_english_grammar_4th_edition_workbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fe7dc20b0151.pdfIn PDF document text
    • http://xubakonuxejebip.iblogger.org/renemavu.pdfIn PDF document text
    • http://kunozoxutokusu.mygamesonline.org/70832636053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420468/normal_5fcf23cd903b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403808/normal_5fcd0e3e96150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_606746918c78f.pdfIn PDF document text
    • http://sujiwajarow.22web.org/vocabulary_words_with_tamil_meaning_and_sentence.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462714/normal_60613a070e367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452621/normal_605d633289294.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nawezopekurid.epizy.com/sb_800_manuale_italiano.pdfIn PDF document text
    • http://laxuzoto.onlinewebshop.net/lasubomudigiguzikexegired.pdfIn PDF document text
    • http://torowenakatum.epizy.com/colloquial_spanish_phrases.pdfIn PDF document text
    • http://pezaruzij.rf.gd/burger_king_near_me_now_menu.pdfIn PDF document text
    • http://jemuxopirale.rf.gd/blueprints_obstetrics_and_gynecology_7th_edition_free.pdfIn PDF document text
    • http://puredaw.rf.gd/77191604864.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/ffa_creed_questions.pdfIn PDF document text
    • http://xakazasaravi.onlinewebshop.net/west_side_story_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f1d985-191c-470d-91a8-ddbefcc402c6/husqvarna_445e_45.7cc_gas_chainsaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39d942f-2f97-436f-bd56-d5f24add4288/rukuboxax.pdfIn PDF document text
    • http://botozagelexi.rf.gd/agenda_de_boda_2020_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5876b6a-d166-4826-b682-dba2535211f9/how_to_weight_train_at_home_without_equipment.pdfIn PDF document text
    • http://moposafasamik.rf.gd/trombosis_venosa_profunda_causas.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_off00015db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB3 5372 bytes
SHA-256: e5516ab3d0482cb536013fd434db33a177c76c4909e231535c2c36ebe9e82df6
font_01_sfnt_off00016ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FFA 11028 bytes
SHA-256: 584bf313dd722efb72bcec462d33d6c28f6c02bc97586c8f8d63ac9e2bb554ad