Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a871e47ccf11df…

MALICIOUS

PDF

107.6 KB Created: 2021-03-25 15:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: dd5eeeff44dc3979a069c63c7b128d56 SHA-1: 8f508c70e9fef7a5ac6988ff35b2bc321603f14e SHA-256: 54a871e47ccf11df1641e4571afedde6e1d9e259fc70a612db46236d685ce7d0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with one specifically pointing to 'xezojetit.ru', suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/wix?keyword=kohler+rubicon+matte+black PDF link annotation
    • http://vipodesin.22web.org/10513695602.pdfIn PDF document text
    • https://xukifunizagopo.weebly.com/uploads/1/3/4/0/134013279/da64755b996b88.pdfIn PDF document text
    • http://choosemadam.site/demulajodaguxovowarikadsrsn.pdfIn PDF document text
    • http://opt15.ru/526986921486lzbg.pdfIn PDF document text
    • https://simejozegedofu.weebly.com/uploads/1/3/4/3/134359486/2834036.pdfIn PDF document text
    • http://instasurprise.online/unit_2_functions_and_their_graphs_answersdp7n4.pdfIn PDF document text
    • http://trynon.xyz/50298912530i7cks.pdfIn PDF document text
    • https://welafunugor.weebly.com/uploads/1/3/5/3/135327357/tufajufokeko.pdfIn PDF document text
    • http://pujugekan.iblogger.org/old_bollywood_movies_song.pdfIn PDF document text
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/1070784.pdfIn PDF document text
    • https://zekaxuwamawebi.weebly.com/uploads/1/3/5/9/135961115/vonitobemaluwopoje.pdfIn PDF document text
    • http://spainsale.pro/how_to_prepare_0.01n_kcl_solutionz9pve.pdfIn PDF document text
    • http://alluniversity.fun/alphabet_wall_chart_free8bxpa.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/garagimet9nkh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigejufad.rf.gd/google_chrome_web_to.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/autocad_free_for_windows_8._1_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/good_science_fiction_books_for_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a36cd53f-fd1b-4920-8839-21a9c37a9446/black_hawk_down_movie_opening_scene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6549d9-c724-4888-8e0e-ef2968da6d1a/synonyms_worksheet_10th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb406b4-d383-4ef0-a30d-8776d70e2b57/fluval_406_external_filter_media.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b536318-942f-473d-bea9-2a985211911c/what_are_the_contents_of_a_book_review_sample.pdfIn PDF document text
    • http://wawaxujogoned.rf.gd/76202105093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a413ac1a-3fb7-4632-91c0-14bd255ec6c1/firex_smoke_alarm_installation_instructions.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_off000161e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161E6 5036 bytes
SHA-256: 7b9485a2d493b5425ece713744995ebde74ec93769a91ccda941661c61652937
font_01_sfnt_off000172dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172DC 13132 bytes
SHA-256: 9f7605c36abbd397966513c9688c0a52849139ac71f28592102cf86f096bd6ff

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