Malicious PDF — malware analysis report

Static analysis result for SHA-256 2434e028acb2441a…

MALICIOUS

PDF

73.9 KB Created: 2021-03-11 00:25:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ac34f7c288014632832c57abe0902fe9 SHA-1: 744ea709fe302206c58868f098121a2318298aea SHA-256: 2434e028acb2441a6f18f64f30806b5f8e1682b0bb0245c4845cef90fe003a96
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'jumiwimov.ru' was extracted, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and the presence of external URLs indicate an attempt to redirect the user to a malicious site, consistent with spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=stoichiometry+limiting+reactant+worksheet PDF link annotation
    • https://cdn.sqhk.co/wugotiparo/v0gcaZP/tisotomenopetaxexakene.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/hijjaha/10516363571.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/jfHpvGg/skylanders_academy_season_3_episode_1.pdfIn PDF document text
    • https://cdn.sqhk.co/livejizilul/ihFhfid/19392118646.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/bXjcgdP/ps4_controller_tester.pdfIn PDF document text
    • http://bobixina.getenjoyment.net/murunalesidimupasetidasa.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/luxelula/all_india_mushaira_video_free.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/tifivagozexolezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff7eed93-c835-4b8f-9d91-9fbd419020b7/dugaxew.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/19005862688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f4eeee-d698-4c21-923e-7cba390b2b17/38396220082.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/56500034589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25be7aeb-18e9-4c6a-9fe6-f665171fffef/46563676463.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/integration_of_cscx.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/xifugepusevaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be72c89-adc4-41b4-8bb6-aa07ba98f6e4/dell_optiplex_780_graphics_drivers_windows_8_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/becf33b0-15d7-49c7-9ae9-1b37e9334985/pretty_little_liars_netflix_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/alimentacion_saludable_segun_la_oms.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/bee_eater_bird_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/mathematical_modeling_problems.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/project_x_lz_95_reviews.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_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 5572 bytes
SHA-256: fb1898e0cf183b76f202cc0d5658ba33880887e175916593c4152863cf50a1af
font_01_sfnt_off0000f568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF568 10248 bytes
SHA-256: 95687c4de352a1adcfb06fec0a20fbb70551def6933ccc3e407e98cb9cae376e

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