Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9275f287c9385c…

MALICIOUS

PDF

66.6 KB Created: 2021-05-10 23:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 032a846f5879a41fcbdc90c785f78673 SHA-1: 5033973cc5b1f9a4f82cf0703f0c8e850d3f3af5 SHA-256: 4e9275f287c9385c7d2d6a94a8eff87a2de9bd4c4e5459a3af7c11e1f10f2ffb
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to obscure the true destination. The primary URL, 'https://jumiwimov.ru/strik?utm_term=avaya+one-x+communicator+mac+download', suggests a lure for software downloads. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. No scripts were extracted, but the extensive use of URL redirection and link farming indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=avaya+one-x+communicator+mac+download PDF link annotation
    • http://lamaded.mywebcommunity.org/85037165685.pdfIn PDF document text
    • http://retamos.mygamesonline.org/les_plantes_c3_c4_et_cam.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/autogenics_3._0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sakikuzugodo.rf.gd/protein_structure_pogil_ap_biology_answers.pdfIn PDF document text
    • http://zoregok.rf.gd/unication_g1_pager_bluetooth_to_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a17381-fa3a-4bd0-afe3-39e70c1884f2/42185923057.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/how_to_connect_hp_printer_to_wifi_using_pin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f60916-a625-4dc5-95ec-ba5272879931/11733091468.pdfIn PDF document text
    • http://datonojafasaxup.rf.gd/87362184351.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/logamomewajo.pdfIn PDF document text
    • http://jedirolin.rf.gd/robin_hood_disney_opening_song_lyrics.pdfIn PDF document text
    • http://dupumimegijema.epizy.com/pirates_of_the_caribbean_piano_sheet_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/71312898955.pdfIn PDF document text
    • http://vetavewolo.epizy.com/biology_terms_dictionary_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21fcbaa9-f71c-4bd8-8b75-783ec9c942fe/how_to_use_maytag_bravos_xl_dryer.pdfIn PDF document text
    • http://joxelugokolutu.rf.gd/classification_of_angina_pectoris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4f1a04-6922-4f53-8891-e71c05166ec1/what_ip_cameras_are_compatible_with_lorex_nvr.pdfIn PDF document text
    • http://nadiripu.epizy.com/pezopikedamuxofikel.pdfIn PDF document text
    • http://fuvogixerad.epizy.com/waterproof_disposable_draw_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/25834219654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ee25fc-15c3-492e-89b4-9da4c59086b4/do_colleges_accept_weighted_gpa.pdfIn PDF document text
    • http://mosiwejajawam.rf.gd/presto_16_qt_pressure_canner_01755_manual.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_off0000c7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CD 5248 bytes
SHA-256: f1405bd64973ae5fb36f56727be8cc028526940f4ae4a57f6e744cf81a159ad9
font_01_sfnt_off0000d9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B2 10436 bytes
SHA-256: 62341875b835c5f597023f0b6f0662063485851e159c188a35e305e69239ebe9

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