Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a3d78a12a09f96…

MALICIOUS

PDF

75.6 KB Created: 2021-03-21 07:36:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 14b6821badb813c5eeef045e723d6cc5 SHA-1: 74789ae11cb74e31826ad14dc67be075163d95f0 SHA-256: 50a3d78a12a09f96b43123b0c067f32fe6421e49ad2122982f150a0e97d00f68
136 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'spinal nerves' and an embedded URI pointing to a suspicious domain. Heuristics indicate this is an image lure linking to an SEO redirector, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=spinal+nerves+exit+the+vertebral+through PDF link annotation
    • http://devgm.design/dibujos_de_frozen_para_colorear_para_niosibhxw.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/watch_time_travelers_wife_free.pdfIn PDF document text
    • http://domainlimax.xyz/migofawumuferidnowq.pdfIn PDF document text
    • https://kigadipokifexi.weebly.com/uploads/1/3/0/8/130813079/kurosazegoxoza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414167/normal_5ff2f04b2630e.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/28959017090.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/peg_perego_primo_viaggio_4-35_infant_car_seat.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/vampire_the_masquerade_camarilla_5th_edition.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/physical_science_grade_12_book.pdfIn PDF document text
    • https://gejomomik.weebly.com/uploads/1/3/4/7/134719116/dowuderuvegixogozi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402737/normal_601c67ff4b856.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/adobe_animate_cc_2015_portable_free.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/felukawudunumavowibevijo.pdfIn PDF document text
    • http://options.expert/perubawugofanikawowuti7v845.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/argumentative_essay_conclusion_paragraph.pdfIn PDF document text
    • http://stnold.com/84255638279uvda0.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/ab641e68-376b-4c0e-88fd-5be3ae635651/58678528400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5942e5a-31c6-461d-97d4-d482d9e2c241/59832312449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09d0a92-1ec8-4605-8f07-6bdc1d432efe/glencoe_algebra_1_textbook_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e345af09-eb17-4d32-8c74-7204551e38a2/50976368352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2976a6-c15a-442f-95ea-b8c756fb58cf/hoover_elite_rewind_plus_wont_turn_on.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_off0000e86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86B 5452 bytes
SHA-256: e904f3b21c70ea4034c48ee9dd04151f18b002af62996a9f5d19b7801efbbf78
font_01_sfnt_off0000faf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF1 11184 bytes
SHA-256: 8e52a4f93fa230f8ede815b65d3cc20cde6225ac8ee0ab936fbbe13221b177b0