Malicious PDF — malware analysis report

Static analysis result for SHA-256 7381b7b5b6c1656c…

MALICIOUS

PDF

75.7 KB Created: 2021-05-24 14:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ae282127980e3d43aecd2bdb02bac928 SHA-1: aaa8aab5d15ee5a7d06c40f93230ac78aef8d92e SHA-256: 7381b7b5b6c1656cea7fa815c844d1a5b01e5579330bb207a35878b2ec56b065
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, suggesting a phishing or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to harmful content.

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 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://xezojetit.ru/strik?utm_term=3+pile+cap+design+example+is+code PDF link annotation
    • https://giderolimarova.weebly.com/uploads/1/3/4/0/134098849/faxugezisev.pdfIn PDF document text
    • https://fasexunatosupa.weebly.com/uploads/1/3/1/6/131606354/rideretadagigabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_606751f61c783.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426697/normal_5fe1b643d4cb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410432/normal_603d523f45528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc11642-1396-4aea-a149-f3bf10e3e122/ho_scale_new_york_central_niagara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7172a222-58ef-43e6-b08d-73a60cead756/nuluvabe.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/vopiduzezafebamemevasowu.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/dirulatibekarejiduxad.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/agathiyar_film_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/modern_cover_letter_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/how_to_set_wheel_size_on_cateye_micro_wireless.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3bed49-f710-4838-a8a3-0e183bb0ef42/suxaxagewo.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/ccna_icnd1_study_material.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b5fb22-2b35-4bcf-95ab-e96373be3cc0/fishman_loudbox_mini_review_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809f5cb1-e3be-41f2-81d1-f3620ff425fd/because_i_could_not_stop_for_death.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc08ad8-fee5-4429-a8c7-a7a0a4dc4c9b/juloxufaman.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/12827916771.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/57126563926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a06247-a0ba-4a7f-9d65-8cbe476c8e9b/how_much_is_an_ipod_nano_4th_generation_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/912a7119-7331-407b-b407-5feed7ba79ae/reading_plus_answers_level_l_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b729437f-00d9-420f-ba84-c9a8514065c0/94689003778.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_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 5432 bytes
SHA-256: 835a788d52982ecadf3707cefc4ee5fe45c30609a1c848a5d8f32d1639b9dcbe
font_01_sfnt_off0000fc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC47 11004 bytes
SHA-256: 9c9ba23f5257e0fb901632f85ef4a3ac3f13a4f2c281ad4222f329d030b24244

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