Malicious PDF — malware analysis report

Static analysis result for SHA-256 9385d6a039b4999c…

MALICIOUS

PDF

83.6 KB Created: 2021-03-06 10:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b7b4e875edf82495b817b5af7ef9a7b6 SHA-1: ff9417ae6244d844dced9cde0b8588a7a9114652 SHA-256: 9385d6a039b4999c365d2f9d1be0377201566a17aafae2565157caf8f0fa3642
156 Risk Score

Malware Insights

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

The PDF contains a link farm heuristic and an embedded URL pointing to 'jumiwimov.ru', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/award?keyword=professional+hair+clipper+set+for+sale PDF link annotation
    • https://kajubuti.weebly.com/uploads/1/3/2/6/132680994/gozawagixa_gilototufegutex_lagugar_lezulabapow.pdfIn PDF document text
    • http://widopomulagu.22web.org/best_free_dd_map_maker.pdfIn PDF document text
    • http://ladunosim.sportsontheweb.net/english_grammar_placement_test.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/71801523105.pdfIn PDF document text
    • http://bivoxuwod.iblogger.org/fejedomuginuzaso.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/acer_chromebook_15.6_inch.pdfIn PDF document text
    • https://kusejatakobex.weebly.com/uploads/1/3/1/4/131438299/2361311.pdfIn PDF document text
    • https://rigonabex.weebly.com/uploads/1/3/1/4/131483185/369771.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/I1cJQge/lezilemiramuvozi.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/91041837730.pdfIn PDF document text
    • https://cdn.sqhk.co/piwixesiwufo/Luejage/pencil_box_kannada_movie_songs_download.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/zusevamasor/55350704139.pdfIn PDF document text
    • http://xeroxofebamuwu.rf.gd/25420436287.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/cengage_chemistry_class_11_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/best_task_list_app_android.pdfIn PDF document text
    • http://xebedosifemopan.epizy.com/edexcel_a_level_biology_book_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/hazmat_license_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/xamejuzajufunuxibunifevi.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_off0000fe02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE02 4892 bytes
SHA-256: 235be94e324f5bf9d47490e2e8a2edcdb2ffef026c7006364f6be69c1c21d5da
font_01_sfnt_off00010e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E90 10672 bytes
SHA-256: 5258f47b0d786a13b902f4389c1ceeb67233316919fb9b75ce06df8c90a95a5f
font_02_sfnt_off00013323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13323 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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