Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f02497fa2db1ed2…

MALICIOUS

PDF

75.0 KB Created: 2021-04-07 03:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ea413ac11b7aed9aa5cc077e3700f0a7 SHA-1: d30763d3f035a69a8918ccfb47078352fbfd136c SHA-256: 8f02497fa2db1ed21092f0c8483fd2f9626420eb19f40636981862b77cfc15eb
206 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed for SEO manipulation or to host malicious content. The 'SE_ENABLE_LURE' heuristic suggests the document prompts users to enable content, a common tactic for malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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 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.
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://leonvi.ru/award?keyword=pdf+converter+word+apple PDF link annotation
    • https://weworikifuga.weebly.com/uploads/1/3/4/5/134515792/poresovukibuzal_buvotepa_nadodegatagoze_mozubigirif.pdfIn PDF document text
    • https://fimiwopagib.weebly.com/uploads/1/3/5/3/135315251/628f95f2f96.pdfIn PDF document text
    • https://pokifuduxorimib.weebly.com/uploads/1/3/4/5/134501468/xivuvaxo-lamatokaviboru.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/28521d4d5.pdfIn PDF document text
    • https://durunefa.weebly.com/uploads/1/3/4/7/134712847/togage_bonidasapeza.pdfIn PDF document text
    • http://lurodug.iblogger.org/types_of_waste_to_energy_technologies.pdfIn PDF document text
    • http://nadurejiw.22web.org/31937343361.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/b9600a73-febf-43e2-aa1b-107d49ed8b95/bavabutopugabufezu.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/baxi_platinum_boiler_user_guide.pdfIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_a09f5dcb3d264152abebdb99b53c4bdf.pdf?index=trueIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_d3ccef6e6148448793d2fbd9233398e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5430d9ff-e76b-4c3a-86c6-7ba57238d67a/bowflex_workout_guide.pdfIn PDF document text
    • http://xatalugatavu.epizy.com/todos_los_personajes_de_100_aos_de_soledad_descripcion.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/project_management_interview_questions_shivprasad_koirala_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a482a8-6e92-41c6-81d5-27e4dc609358/64607448798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1154674-59f5-4b85-bd59-9d6db721f9ce/discuss_the_methods_of_data_collection_and_analysis_in_social_psychological_research.pdfIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_6e2d4855af394ad69b89815f42c0292e.pdf?index=trueIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_f001f4145ff34272a3458057e8400b4b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce02eed5-0b6e-4722-b124-cd28d68dc0d7/xakawajotelekuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15adcf7a-90a4-4d49-87c8-a8a34560b365/whats_the_difference_between_cat_and_dog_hair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783a5326-e7bd-46bf-be36-584935c1d0d7/family_feud_switch_answers.pdfIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_5612bc6413524ad7a74b6cf67234c69e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c799a17d-7fe9-4cbb-917e-5c1ed82df561/los_rios_de_color_purpura_2_online_castellano.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/does_netflix_expire.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/goblin_guide_modern_deck.pdfIn PDF document text
    • http://tisenunab.rf.gd/janelorolafojarubet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80c629ec-0643-497d-a6e7-39a802ced676/how_to_make_an_equation_in_slope_intercept_form.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_off0000e700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE700 5124 bytes
SHA-256: 865937ce611781e4f0faa23ac5c5c513f4ae06d9d028332ae3098326fc07096f
font_01_sfnt_off0000f898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF898 11224 bytes
SHA-256: ac3d305b69699852083633d79b968a0c5f270d1c2f5167731f36d7ff5fee8696