Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db6daddb12b17e5…

MALICIOUS

PDF

75.6 KB Created: 2021-05-16 15:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e0ced3c172fdfb1edc8b6cec77181014 SHA-1: e83dfb4851d1ad4ed5a734d567f1cba4512540ec SHA-256: 9db6daddb12b17e53eebbcf161652bfe7fb8cb6cb89e44788b8acae21e82b80a
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=free+ged+practice+test+florida+2020 PDF link annotation
    • http://betizekaxu.getenjoyment.net/app_store_submission_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/surofowudula/hgLgdEW/android_manager_multiple_files.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/i1CfjeC/samsung_internet_browser_download_paused.pdfIn PDF document text
    • https://jafazoragi.weebly.com/uploads/1/3/4/7/134769717/4256e28c2320f82.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/droit_de_l_urbanisme_au_maroc.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/jd4jaja/guilty_crown_ending_2.pdfIn PDF document text
    • https://dozexida.weebly.com/uploads/1/3/4/5/134590021/vivajewuta.pdfIn PDF document text
    • https://zogopovedizojux.weebly.com/uploads/1/3/1/4/131408172/zetugusanotugif.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/cooking_oil_formula.pdfIn PDF document text
    • http://tebepif.22web.org/labelafik.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/Y3hapig/echo_voice_recorder_app.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/dusubonifu/java_7_update_45_64_bit.pdfIn PDF document text
    • http://vigopul.epizy.com/pdf_budismo_para_leigos.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/69737829585.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/rabovuj.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/bt_sports_australia_tv_guide.pdfIn PDF document text
    • http://jerovobaba.rf.gd/idealist_theory_of_international_politics.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/12258703188.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/73986667914.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/pediatric_orbital_cellulitis_treatment_guidelines.pdfIn PDF document text
    • http://livijakowoleb.rf.gd/side_by_side_book_1_audio_cd_download.pdfIn PDF document text
    • http://xujalebarot.epizy.com/41272176709.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/glencoe_mcgraw-_hill_answer_key_math.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_off0000e9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E7 5552 bytes
SHA-256: 530d1dc48eadadc3023c93d2baa96e819c05ec01842cdad313e7f76d50870ec3
font_01_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 10724 bytes
SHA-256: ed4eb53cff965df72b5570e105c1143f0da14dfaef950f18477ae557104a1c79

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