Malicious PDF — malware analysis report

Static analysis result for SHA-256 691ac7ea0f25bc75…

MALICIOUS

PDF

99.8 KB Created: 2021-04-22 00:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7d215d1d55ce9226e99782d9916433d SHA-1: bf4b40b9e49ccd0d1373e702d659775b8a3eb554 SHA-256: 691ac7ea0f25bc754b258dd8044fdb129a08b8420db4c9d8b0d43a16f2cba27a
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, which is likely part of a phishing lure. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it's designed to redirect users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=is+bluetooth+keyboard+compatible+with+ipad
    • https://cdn.sqhk.co/lekusovu/mzgfher/nusavejun.pdf
    • http://trells.space/linear_inequalities_in_two_variables_word_problems_worksheetv3ql9.pdf
    • http://sinoxaju.mygamesonline.org/advantages_of_descriptive_survey_research_design.pdf
    • http://org-fruit.space/pofudowexolujogapaxmd5.pdf
    • http://justamorem.com/integration_formulas_for_class_12_hscvzmaj.pdf
    • http://wejuzofibab.medianewsonline.com/what_is_the_law_of_probability_in_biology.pdf
    • https://cdn.sqhk.co/dipewoduge/HghidQJ/pyramids_of_egypt_history_in_tamil.pdf
    • http://constructionhouse.info/why_were_books_banned_in_germanyf784a.pdf
    • https://cdn.sqhk.co/redupalulaxo/hgjjcIw/fuboxipi.pdf
    • http://uuuuull.space/duwopizugonopupuwesodutiunly1.pdf
    • https://cdn.sqhk.co/kolusugego/7G6gfyl/62036772104.pdf
    • http://xukosususif.medianewsonline.com/don_t_let_me_down_the_beatles_piano_sheet_music.pdf
    • http://puvepum.getenjoyment.net/13840096357.pdf
    • http://idealicaufficiale.website/956632335769ddk7.pdf
    • https://cdn.sqhk.co/givogaduta/EjisgdE/stampin_up_fall_card_ideas_2020.pdf
    • https://cdn.sqhk.co/ganuniwiku/cZYijgg/paypal_prepaid_mastercard_customer_service.pdf
    • https://cdn.sqhk.co/rinovizifim/ugi5cgg/19839990019.pdf
    • http://chisto-chisto52.ru/organisational_skills_interview_questions_and_answersvfqfc.pdf
    • http://emirofficialzm.com/33312197494db639.pdf
    • https://cdn.sqhk.co/badaxiloru/gfGggdz/verizon_call_blocker_app_free.pdf
    • http://fruitslope.online/jacques_vert_dress_size_guide754ya.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://liroporuki.myartsonline.com/online_banking_services.pdf
    • http://molagegivijoxu.onlinewebshop.net/subtracting_integers_word_problems_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001320a.bin
914a8d3fd380a20fb7787d381814d9a2678338134a1b03333ed8f49ebb400835		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1320A 5648 bytes
font_01_sfnt_off00014520.bin
9d3590cbbb93fac42ba4f246ea6e2cbd1c0e1bd5b38614274fb4d806a5be8ecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14520 11616 bytes
font_02_sfnt_off00016c4a.bin
4f13af0f20517edda7c7dcdedb9fe67658c8089ac2dd95a01e7bfc99adddc0c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C4A 16140 bytes

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