Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4007ce1bf4c4a2b…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 16:46:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: a43790f6c44c871b4af1b6beb543ad51 SHA-1: 95c49958600cf0d5c10198e69ba5f81d14b20a13 SHA-256: e4007ce1bf4c4a2b9018c590388ff59bd88d7327140c76551b3d0c3d487a2c1a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to obfuscate the final malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, contains text related to 'Relion confirm blood glucose meter test strips', suggesting a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/strik?utm_term=relion+confirm+blood+glucose+meter+test+strips PDF link annotation
    • http://biolinkus.me/sekigirujufodugq9y7d.pdfIn PDF document text
    • http://lorubuxetorifa.medianewsonline.com/79289045342.pdfIn PDF document text
    • http://genusadnlo.space/duluvajeranelibelufi1k9.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/ielts_reading_practice.pdfIn PDF document text
    • https://cdn.sqhk.co/gevopobi/5992hbZ/ashampoo_free_serial.pdfIn PDF document text
    • http://reduslimitalia.site/yellow_pages_phone_numbers_uktqoq8.pdfIn PDF document text
    • https://cdn.sqhk.co/zozotetowa/8jagijb/pazotuferemozut.pdfIn PDF document text
    • http://aycotoro5.xyz/warrior_cats_games_onlineotnii.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/7jbwhjK/83650694307.pdfIn PDF document text
    • http://napodosawukezob.getenjoyment.net/39507208524.pdfIn PDF document text
    • http://depusapo.mypressonline.com/excel_beginner_course.pdfIn PDF document text
    • https://cdn.sqhk.co/bupitagalir/tjeOOia/racing_goggles_gw2.pdfIn PDF document text
    • http://ig-copyrightviolation.com/xilomajekundyy.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/wuxofipuzom.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/gjaQjew/wheel_size_skateboard.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/ehgDxtl/3468389210.pdfIn PDF document text
    • http://dodajavux.scienceontheweb.net/13631430746.pdfIn PDF document text
    • https://cdn.sqhk.co/titukopano/jBbUgVj/mipos.pdfIn PDF document text
    • http://xifasiv.getenjoyment.net/lofurugaribasutiwadom.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/79817570689.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/MJgjJgd/ziwolejafokeveloravowu.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/satulibaren/pagaf.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/cerritos_college_map.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/cbse_guide_class_9.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/kidug.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_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 5412 bytes
SHA-256: d916ce2ddb44d96b65eca7a1f8f95c3284689492b0c9a0789a54592f085914a9
font_01_sfnt_off000100bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BC 11256 bytes
SHA-256: 48ccb869595cc957be6b1c46f8a1fe7da770c28c11c774405a1d9510f507b9a5

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