Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9cc1fd34fcb71a9…

MALICIOUS

PDF

89.7 KB Created: 2021-04-15 23:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4f9045daed0028abc823d7de88a89ada SHA-1: fb22d5583a5ad6c753feaf9cb3b0b538a44ca09e SHA-256: a9cc1fd34fcb71a9c25c392734c19890c7ab612b958a53e59dfa4c465e7aa9c1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'kuzutuzo.ru/strik', suggesting a phishing or malware distribution attempt disguised as a free movie service. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting this. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://kuzutuzo.ru/strik?utm_term=watch+pure+flix+movies+online+free PDF link annotation
    • http://yyyyyyhhhhh.space/963271224261l1t5.pdfIn PDF document text
    • http://shtancircul.site/70020945638j9uky.pdfIn PDF document text
    • http://vekvelo.ru/holy_rosary_guide_thursdayhgf0s.pdfIn PDF document text
    • http://coins24h.com/how_to_add_mendeley_web_importer_to_chrome5825e.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/iaDbRhj/64479532608.pdfIn PDF document text
    • http://lokotahas.ru/tableta_rca_voyager_pro_7_specsmlq65.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/TRPgchf/voice_recorder_freeware_windows.pdfIn PDF document text
    • https://cdn.sqhk.co/numobelez/hgVKhiV/thinking_in_java_source_code.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/robumuduluwise/90169734417.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/mirae_asset_tax_saver_fund_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/lejebekilirikaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136a135c-7d4c-425f-80c1-2235576a0b27/wimpy_kid_movie_actress.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/best_flight_simulator_games_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/zevinulirifunijikax.pdfIn PDF document text
    • https://23fe9111-5aa3-4288-b7a4-a84c242bb647.filesusr.com/ugd/d35b85_14db0882a90e4c77b03910def10f78a0.pdf?index=trueIn PDF document text
    • https://0d801636-e20c-47cf-9654-f2c4f0d28fb9.filesusr.com/ugd/2e7c9c_72b7f975982b42b4bc679252d3cdbca6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5570717-eec2-4739-9e68-a8b4a894b2f5/starting_new_life_love_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f10d05-2d38-44f9-add2-ca0b12d460f7/39122886952.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/lillington_nc_police_department_accident_reports.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_30425bbebe0440d5960a7fe2d3bd0b70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/abstract_and_concrete_nouns_worksheet_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/72074943877.pdfIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_73fca37e82d3473ab51f8f7fd2ce3e25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gateme/warerixiganipejuvojefa.pdfIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_c53f53a212ac4cdf909e27f85cceb72f.pdf?index=trueIn 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_off00012237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12237 5396 bytes
SHA-256: e0d9e7eb8167b5132e1de18a52eedd1b6b4c5aaae11aed12fe5091f96867d4bd
font_01_sfnt_off0001347a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347A 10732 bytes
SHA-256: 42c1edd72f58bd22acc60c4a3a711b34d13fbcd44d29cec6c80920e05b5d985e

Open this report in the interactive analyzer, or submit your own file for analysis.