Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34c7aa30590c521…

MALICIOUS

PDF

79.2 KB Created: 2021-06-07 02:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7341dfe4c5422413e5b1cb5f603347df SHA-1: 46f46502aa37e8fcc637ae1ca6e6c94419937200 SHA-256: d34c7aa30590c521f86377211ec2e31dcf3227129c76a8e730846d6376a438a9
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URLs, many of which are hosted on disposable domains or use UTM parameters, suggesting an attempt to manipulate search engine results or drive traffic to potentially malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or content-scraping scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://queure.ru/pbw?utm_term=what+are+some+disadvantages+of+genetically+modified+foods PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462350/normal_602283fe9748a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_6022b6fd42216.pdfIn PDF document text
    • https://wixefonimav.weebly.com/uploads/1/3/1/4/131437632/wixam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_6010936884e08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372371/normal_5ff92724b9141.pdfIn PDF document text
    • https://zigetavut.weebly.com/uploads/1/3/0/8/130814179/7195308.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e14982f1-3401-40c7-9259-55e570a474c4/descargar_el_conjuro_2_pelicula_completa_en_espaol_latino_media_fire.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/f/36041662293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d6cc566-5370-4203-975a-cdd7fc5d9336/fl_studio_macbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b6faef-e6eb-459c-adee-733a90501e1f/69563915142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909c4cc4-5c86-4ddc-91a8-00369511d932/how_to_cook_a_25_pound_turkey_in_a_roaster.pdfIn PDF document text
    • http://kusarolox.pbworks.com/f/the_ultimate_guide_to_body_recomposition_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a127b8-b663-4a2c-b1a4-b78ffad2de3b/wejexuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7c0a18-80d6-48e5-af4d-238f43e62339/comfort_aire_dehumidifier_reviews.pdfIn PDF document text
    • http://gibuwodebu.pbworks.com/f/benim_hocam_corafya_video_ders_notlar_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f1b274-e4d8-4f41-bee8-8df4053f053c/wokijomoxifiwefivivofab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e871b1-b949-4296-81bd-ad50d7fb1584/vans_old_skool_navy_blue_and_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f60c3614-1eef-4236-aa83-c07255148f96/singer_4-in-1_futura_quartet_sewing_embroidery_quilting_and_serging_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d6c0a4-d6f3-4d4b-af0c-937465b0e1a2/6423209922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9923743b-83cc-45dc-b89d-1b955a6e6a6d/modo_de_produccion_capitalista_karl_marx.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/f/geometry_dash_2.12_noclip_pc_2.11.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CA 5400 bytes
SHA-256: fc5cc6993e4cbfd4425cd8c105f54240151a3a93671117d6f0ee4e3d629e9768
font_01_sfnt_off0000fb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1A 10780 bytes
SHA-256: 4e20eaf7710d159408ec81a47840ed8de81498ca2314ec1fdcb1f01612dedcbd
font_02_sfnt_off00011f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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