Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb81eb44a1e8e814…

MALICIOUS

PDF

76.8 KB Created: 2021-03-16 17:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5fe9cd71230131c919bd89b5f8a759ae SHA-1: 2e937af063ca922e48e67c435182b4bf4d8180ba SHA-256: eb81eb44a1e8e814d839fbe317cbef29cf51ce538f109bf4143efb83974db10c
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 0.9994

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://golowaki.ru/123?utm_term=beethoven+pathetique+sheet+music+piano PDF link annotation
    • https://cdn.sqhk.co/votojuxosaf/idBfRwq/pokemon_tcg_online_trade_values.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/iezegd5/tron_light_cycle_scene.pdfIn PDF document text
    • https://nitipitu.weebly.com/uploads/1/3/0/7/130775162/zabudimukumises.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/hgC4XaC/big_rig_travels_youtube_new_mexico.pdfIn PDF document text
    • https://vebuwume.weebly.com/uploads/1/3/5/3/135349689/nuduvivir.pdfIn PDF document text
    • https://xifasojole.weebly.com/uploads/1/3/0/8/130873801/vureterutuvegufozewo.pdfIn PDF document text
    • http://sinoniwim.22web.org/13840525590.pdfIn PDF document text
    • http://sezejawi.mypressonline.com/zozemediwok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gajabedafot/principle_centered_leadership.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/49724478408.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/jatumizozat.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/29750946344.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/fire_service_recruitment_application_form_2018.pdfIn PDF document text
    • http://tatifamajerub.epizy.com/belajar_photoshop_cc.pdfIn PDF document text
    • http://pebomotixot.myartsonline.com/xubenuposipa.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/bevilacqua_sheet_metal.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/knight_age_online_item_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/92199924916.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/probability_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/murrel_fish_farming_project_report.pdfIn PDF document text
    • http://mepitar.atwebpages.com/rewrite_the_following_sentences_using_the_words_in_brackets.pdfIn PDF document text
    • http://lenofafezanobu.atwebpages.com/42485801124.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD5 5160 bytes
SHA-256: c44520f75d02a1ff7f22cfac0b1917f8773e7ca075339d80022a4a4ec4775f43
font_01_sfnt_off0000f144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF144 11148 bytes
SHA-256: 8b11943fdfefcfe60f6bf5033fe47446aa014a436a95898e048973fb1ba376d1
font_02_sfnt_off00011732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11732 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.