Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02b09f413510257…

MALICIOUS

PDF

71.0 KB Created: 2021-03-27 18:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5545246abf711eee322d9eb65aa1d330 SHA-1: 53d688bcf745e8a2bd8cc8b4405378f32e389877 SHA-256: a02b09f4135102573861639de444341c8fca23e7f889a8237af22cd44ca8daa0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/123?utm_term=atheros+9485+driver+windows+7 PDF link annotation
    • http://italy50wow.pro/248266907364bazq.pdfIn PDF document text
    • http://dhl-order.info/how_to_answer_job_self_assessment_questionsd4wwk.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/nuxegdif5n.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/puxobuk.pdfIn PDF document text
    • http://podarokinsta365.site/noloraretosozu3fra1.pdfIn PDF document text
    • http://iceteas.space/attendance_allowance_form_from_post_office3cl7r.pdfIn PDF document text
    • http://xutifufaxe.mypressonline.com/the_economist_july_2020.pdfIn PDF document text
    • http://mixed-rootwork.com/faxerujuxibakuxopififuawc.pdfIn PDF document text
    • https://cdn.sqhk.co/goremujoz/O0gdpiG/gulenujexamibaj.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/realidades_2_textbook_page_50.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/todukomazifupij.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoposuj/gfn8geG/virgin_radio_italy_app_data_usage.pdfIn PDF document text
    • http://ihsteam.ru/yoga_cards_for_beginnersdz8r1.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/ggdbzCb/kutikegejetiter.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/fejififimaketo/huckleberry_finn_summary_chapter_12-14.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_cce3f1ecfd14400e997f0cc0ebe053cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/netacad_networking_final_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/78595446982.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_245f0c0730d341bcbb3ea108544c0465.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/potamotaz/83192904522.pdfIn PDF document text
    • http://pigumomibi.onlinewebshop.net/titire.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/6925919836.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_off0000d6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E3 5452 bytes
SHA-256: 5ac2ece222cdc71313433c53001c2badbbe9cacfbcd1809aeb2de1cd21b3caa4
font_01_sfnt_off0000e992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE992 11304 bytes
SHA-256: 4e6111772e8b5396d3bbea2ea5481e6a2aab36e901ff4e063d4fcdccf8e1f2a0

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