Malicious PDF — malware analysis report

Static analysis result for SHA-256 8341b94eee387284…

MALICIOUS

PDF

75.1 KB Created: 2021-06-04 22:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c51b5b562b04396cb318f21839d60131 SHA-1: df3c0ddc296170475140462ee098255a2a10d3d5 SHA-256: 8341b94eee3872841a26d30c8f5ec691ca533287a8024095abcb6653220497f4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/pbw?utm_term=how+often+to+change+manual+transmission+fluid+honda+accord PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476582/normal_5ffa5069a8eaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403119/normal_5ffed2982e9b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413239/normal_5ff0bf465e76d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481397/normal_5fcc500acc707.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377400/normal_600554652a322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_6027249f321d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sepaxebi.pbworks.com/w/file/fetch/144413727/gakojozisitusozidibika.pdfIn PDF document text
    • http://xutosop.pbworks.com/w/file/fetch/144615543/canidae_puppy_food_feeding_chart.pdfIn PDF document text
    • http://jeselivid.pbworks.com/f/mewaxamavigoxije.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/f/79951864950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/320c5b74-fc1c-4eed-811a-e3fb1944fcf4/theory_and_practice_of_counseling_and_psychotherapy_exam_questions.pdfIn PDF document text
    • http://mikabipi.pbworks.com/w/file/fetch/144432618/how_long_does_speed_queen_dryer_take.pdfIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144412407/islamiat_general_knowledge_mcqs_in_urdu.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/w/file/fetch/144489762/how_to_get_free_v_bucks_ps4_without_human_verification.pdfIn PDF document text
    • http://zudilazo.pbworks.com/f/65041184280.pdfIn PDF document text
    • http://muxopal.pbworks.com/f/nowafitelupajajevunu.pdfIn PDF document text
    • http://redelaw.pbworks.com/w/file/fetch/144553947/sebikowolab.pdfIn PDF document text
    • http://zekodunu.pbworks.com/f/90839000213.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/f/ballaststoffarme_lebensmittel_liste.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb70fff-1588-430f-b363-ba080cb0185a/diamond_razor_edge_string.pdfIn PDF document text
    • http://wigiwopajuke.pbworks.com/f/when_did_sears_and_roebuck_catalog_begin.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/w/file/fetch/144514716/65959891138.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_off0000e86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 5488 bytes
SHA-256: 9fc68c1a6f2e8d23c99298a5752962433625f3738b11174aac539c4617af9a04
font_01_sfnt_off0000fb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB00 10520 bytes
SHA-256: 5be68ab29d47306d85d5d874e6a632fe13ba19a171a5f43ffb6680ba75ea7b88

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