Malicious PDF — malware analysis report

Static analysis result for SHA-256 85def047a44d3835…

MALICIOUS

PDF

80.5 KB Created: 2021-03-18 10:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a9a9e3fcb3ec0c270b89cd7d609bead8 SHA-1: f567b7e4cde3d56c7345f447095c3f68a972fc17 SHA-256: 85def047a44d38354dff3d47415bb9cac16b3b0fc95ebb2c7be1fd02e3a2a210
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users. One prominent URL, 'https://leonvi.ru/strik?utm_term=keurig+k45+elite+cleaning+instructions', is identified as a redirector likely leading to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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.
  • 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://leonvi.ru/strik?utm_term=keurig+k45+elite+cleaning+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421335/normal_6032c72bd3fb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453144/normal_5fff7eebd89d4.pdfIn PDF document text
    • http://wopebexe.66ghz.com/que_es_dieta_astringente.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_600bad123d499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415937/normal_602005c184c4f.pdfIn PDF document text
    • https://xopoloxunevagig.weebly.com/uploads/1/3/1/4/131406528/c8708bb36d70262.pdfIn PDF document text
    • https://larezonisu.weebly.com/uploads/1/3/0/7/130738889/jabexikeni-fijetudisifi-gusikawuze-fulujomudol.pdfIn PDF document text
    • https://wibabuxef.weebly.com/uploads/1/3/1/3/131380054/03c63b68223e15.pdfIn PDF document text
    • http://subeziti.22web.org/liverpool_vs_chelsea_super_cup_highlights.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446019/normal_602ab986374e4.pdfIn PDF document text
    • https://kitijudaxedefex.weebly.com/uploads/1/3/5/3/135350735/29c326d38b2fa54.pdfIn PDF document text
    • https://virutabadipepuv.weebly.com/uploads/1/3/1/3/131398083/2752122.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/video_instagram_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/valkyrie_crusade_mod_apk_4._4._2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/492a381c-8490-4693-84cc-dddbf843b189/how_to_use_round_loom_for_hat.pdfIn PDF document text
    • http://daduzafez.epizy.com/stephen_hawking_medical_condition.pdfIn PDF document text
    • http://belavujelu.epizy.com/name_with_happy_birthday_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/17038160453.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/class_d_amplifier_schematic.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/27720446793.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/zakoturisedoxaze.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/earth_s_spheres_webquest_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/rapidesign_lettering_guide_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/zonelakopis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a59a116-270a-4696-ab14-c8cb42e7d483/design_as_art_bruno_munari_review.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/reglas_de_acentuacion_de_las_palabras_esdrujulas_ejemplos.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_off0000fc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0D 5212 bytes
SHA-256: f7cd354785ed82f5480aadaec823fe701b11a09bb591a1ddad1ab56661898e5a
font_01_sfnt_off00010de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE8 10772 bytes
SHA-256: da2fc3aca5ec7bd6dedef5c1acef873f4f60c8fb32d88d4ed617b49734d899dd