Malicious PDF — malware analysis report

Static analysis result for SHA-256 8343119328d9d5e2…

MALICIOUS

PDF

93.5 KB Created: 2021-04-05 01:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4c41ddcf8011e3e1e0b664aa25eda38f SHA-1: e5d7a5ab05c0f3cf8c7f88f7bd184a80336dd237 SHA-256: 8343119328d9d5e2389a8c03c00004cf6a39654a966f8a2e7e9d200cd5661d00
96 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://resalured.ru/award?keyword=abrasion+resistance+of+concrete+pdf` suggests a phishing or social engineering attack, masquerading as a search result to trick the user into visiting a malicious site. No scripts were extracted, but the PDF structure and embedded URLs are sufficient to infer a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/award?keyword=abrasion+resistance+of+concrete+pdf PDF link annotation
    • http://venolilixe.mygamesonline.org/los_angeles_tourist_map.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/check_list_auditoria_interna_iso_9001.pdfIn PDF document text
    • https://cdn.sqhk.co/tutogalubete/ajejdii/hocus_pocus_halloween_costumes_sarah.pdfIn PDF document text
    • http://mosuxuvemuzuwex.mywebcommunity.org/ball_badminton_new_rules_and_regulations.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/gejhxAL/wixatinegomifobal.pdfIn PDF document text
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/1bf141365.pdfIn PDF document text
    • http://mofonuf.medianewsonline.com/project_black_book_sample.pdfIn PDF document text
    • https://nenesezeli.weebly.com/uploads/1/3/0/7/130775424/549203.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/hbjaWje/70970229338.pdfIn PDF document text
    • https://nidimojisojetuz.weebly.com/uploads/1/3/5/9/135962904/bufekurajetuluw.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/6hdigjb/calligraphy_fonts_free_marathi.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/WihghXV/28242410999.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/somisilegex/washington_state_prevailing_wage_fringe_benefits.pdfIn PDF document text
    • http://sujidise.epizy.com/20062928294.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/puberezeditex.pdfIn PDF document text
    • http://maduzelur.epizy.com/maxcare_extended_service_plan_claims_phone_number.pdfIn PDF document text
    • http://vuvuvemalazot.epizy.com/transunion_industry_insights_report_q3_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/bethel_it_is_well_sheet_music.pdfIn PDF document text
    • http://fujeximadotut.rf.gd/geometry_worksheets_for_grade_2.pdfIn PDF document text
    • http://liboditi.rf.gd/20092301923.pdfIn PDF document text
    • http://bexukavibume.myartsonline.com/xuwobuwanipipurafulu.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/the_aeneid_sparknotes_book_2.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/positive_action_bible_curriculum_6th_grade.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A32 5248 bytes
SHA-256: 8451d8b5340fde1fd4ac5ba03174e51687b16079336d41c5807192de0525aa91
font_01_sfnt_off00012c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C13 12148 bytes
SHA-256: 357c162b47327b8b540f53abeaaa94fca1f0ddcea3f6e070d27fdb696528259e
font_02_sfnt_off00015360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15360 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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