Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b2c91f487c519d…

MALICIOUS

PDF

78.2 KB Created: 2021-03-13 17:30:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b2082bb7d26140db1ec82175d8b9195b SHA-1: be739b2c5a702591e0f7f41d9f8b26d385585a60 SHA-256: 17b2c91f487c519d2568eadca3fb98f8a7ef5b751d2c5f6cc0f5a263a3ea7df4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, 'jottigo.ru', which is likely used to host a phishing page or deliver a second-stage payload. The document body, though heavily obfuscated, contains text fragments that may be part of a lure.

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://jottigo.ru/aws?utm_term=art+of+living+retreat+center+bangalore PDF link annotation
    • http://xepewifub.mygamesonline.org/wordly_wise_book_5.pdfIn PDF document text
    • http://mofemaruwek.sportsontheweb.net/2763398736.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5fe03e4207beb.pdfIn PDF document text
    • http://weridif.medianewsonline.com/dawezufasumozixepaz.pdfIn PDF document text
    • http://sarawavenudiwap.mygamesonline.org/apple_quartz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446650/normal_5fdc1556341c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_6022a6e4254c4.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/azotemia_e_uremia.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/ibps_gramin_bank_recruitment_2020.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/what_is_the_best_english_grammar_book.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/bokelur/different_calligraphy_fonts.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/nadajipinoredakevaxobinu.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/jebakovilofekawe.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/amazon_kindle_android_tablet_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2849a1b7-0eb2-4623-907f-7adc507e145e/how_to_use_income_summary_account.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/78668389247.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/how_do_you_charge_a_ego_t_vape_pen.pdfIn PDF document text
    • http://mawokale.myartsonline.com/will_school_fees_be_reduced.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/english_to_bengali_dictionary_for_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdea0712-a47a-45c0-ad37-887f3ea55820/37336325852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d5be2b-aa1d-440b-8f37-96bf24ae5851/47327016379.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_off0000f20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 5060 bytes
SHA-256: cd8f04b6b62700f1540ae5593a93388a1dd15b5805293e376e70e3e8cbd85d12
font_01_sfnt_off00010365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10365 11632 bytes
SHA-256: 0e45205cf9663ed63e8f241bc49442cfd704242e53b86f3b0f11d30ea0a8adf3

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