Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf124fe41dbb6427…

MALICIOUS

PDF

71.0 KB Created: 2021-02-11 20:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 55336ede9bd1c9550708ff2ef83f4523 SHA-1: 542b308c828661d555e3598a8a82ede50471f28f SHA-256: bf124fe41dbb64275622820f0d0b2427c158e018b377eff79fdfb7026a94e24f
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • 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://yafferge.ru/wix?keyword=belleza+y+estetica+en+el+salvador In PDF document text
    • http://azalea.store/pelusedowafujebarewevafujn3xi7.pdfIn PDF document text
    • http://2220202.ru/pitbull_dog_collars_australia0jc3f.pdfIn PDF document text
    • http://uscovidcharts.com/66199967464ej633.pdfIn PDF document text
    • http://insurancesouk.com/axure_rp_8_license_key_macbd5m2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_600c75055066a.pdfIn PDF document text
    • http://leopards.space/autotransformer_starter_control_diagramqkjcr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455659/normal_601e536c53c25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419826/normal_60101306c3eef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487201/normal_5ffd0db4d80fd.pdfIn PDF document text
    • http://circulyarkadigital.xyz/tadipifemesuzx218r.pdfIn PDF document text
    • http://fullstacket.online/1080_x_1920_wallpaper_vertical_androidfw5hx.pdfIn PDF document text
    • http://loginwithfb.site/thailand_fried_ice_cream_roll_recipe2wt6u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://besasasef.rf.gd/mizabumekukovesesuwonulo.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/autocad_underlay_hide_frame.pdfIn PDF document text
    • http://fanutebuxus.rf.gd/further_processing_epo_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/descargar_test_de_raven_completo_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/booklet_layout_design.pdfIn PDF document text
    • http://jeragapa.epizy.com/microsoft_word_avery_label_template_5366.pdfIn PDF document text
    • http://befokube.rf.gd/free_cv_template_word_file.pdfIn PDF document text
    • http://gitogopafo.epizy.com/23517845925.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_off0000d3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CB 5192 bytes
SHA-256: abfa6f39247d4b24603b4a1cab1ba6007a8ece5c3317d152200217f3ecadccfa
font_01_sfnt_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 12316 bytes
SHA-256: 8e4f2febf3d22b7e3c91359a3ac6bf94a3709454affed1db5767347e7ab9df19