Malicious PDF — malware analysis report

Static analysis result for SHA-256 85dc1d42cb64a1da…

MALICIOUS

PDF

75.8 KB Created: 2021-04-17 09:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 41796feefe7708642308a288e1f95d19 SHA-1: cfdb893d71782a874cd745c1501663706d39291e SHA-256: 85dc1d42cb64a1da0cf572afcf58343adc9d48f8991fba33e84a9a604f63cfa9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The PDF contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure strongly indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://gimoguvi.ru/strik?utm_term=yiruma+river+flows+in+you+partitura+piano+pdf PDF link annotation
    • http://misstourist.info/98164919461uzmpg.pdfIn PDF document text
    • http://buytoday.cc/the_great_gatsby_chapter_2_discussion_questions_and_answersv0ct2.pdfIn PDF document text
    • https://woloxujujesif.weebly.com/uploads/1/3/4/7/134716607/kadawefotefubam-biwevinozul.pdfIn PDF document text
    • http://dle-tpl.site/jukokadijexidukarefe3et4.pdfIn PDF document text
    • http://manidat.sportsontheweb.net/marriage_biodata_maker.pdfIn PDF document text
    • http://fringigejy.site/kodak_esp_3250_wirelessr5tnu.pdfIn PDF document text
    • http://7lessons.website/xipigavnipd0.pdfIn PDF document text
    • http://uscreditreport.info/328155809bgumy.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/pukomofinarasifebubo.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/core_java_sample_programs_for_practice.pdfIn PDF document text
    • http://reetodo.online/lizolep794o2.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/lowrance_hds_7_gen_2_cover.pdfIn PDF document text
    • https://tasukivokojut.weebly.com/uploads/1/3/4/5/134592673/fogesolan.pdfIn PDF document text
    • https://fenejetamop.weebly.com/uploads/1/3/4/6/134697978/lotuviw.pdfIn PDF document text
    • https://padawevuwelidas.weebly.com/uploads/1/3/1/4/131438111/89fb614dda.pdfIn PDF document text
    • http://indir-kazan.com/sobreviviendo_a_pablo_escobar_capitulo_7r9jb5.pdfIn PDF document text
    • http://terem.space/97795738194zlmvb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xepatodop.onlinewebshop.net/ataxic_hemiparesis.pdfIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_eca060bf00c04eb5bc6a200bd064da09.pdf?index=trueIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_660460591231406d8fe18b600025968b.pdf?index=trueIn PDF document text
    • http://jekurur.atwebpages.com/21445533637.pdfIn PDF document text
    • http://zevusup.atwebpages.com/james_baldwin_go_tell_it_on_the_mountain_sparknotes.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79E 5400 bytes
SHA-256: e59e909c5dd3fa953546ac27a51bd866e83dd4d131548ba340b6c3036fd55ce2
font_01_sfnt_off0000fa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA03 11580 bytes
SHA-256: e4e9e336ce85803b3b2584c28a70fd392edd00a9498b7186dce2e5b48776d546

Open this report in the interactive analyzer, or submit your own file for analysis.