Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb0ac64e536f38b…

MALICIOUS

PDF

79.9 KB Created: 2021-09-13 08:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b43d96a9ba4a7f7449f777cfc4ab6f5f SHA-1: 52089f2304ac8ad387c2f5bcdfee467afbe3c9fd SHA-256: 7eb0ac64e536f38b6d5951402e88ef1d5dc137bb7b3dd44a0237ee3e074b36d0
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting and are structured as link farms. This suggests the primary purpose is to redirect users to potentially malicious websites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laborke.ru/uplcv?utm_term=mi+11+5g+antutu PDF link annotation
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/3d97e92b59b55a854aa04b01e0df7207/26818608771.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/migikuxajagetoveliwo.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/79830033504.pdfIn PDF document text
    • http://jutaek.humenia.com/upload/userfiles/2021/09/files/210906115809.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/tisuzerudar.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/jamoloxejewuwopafulolodid.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/18847828345.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/93466159921.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/40185627108.pdfIn PDF document text
    • https://sandipkumardutta.com/ckfinder/userfiles/files/85949446450.pdfIn PDF document text
    • http://vecsecity.info/editor_up/rafovenunebasefojejavoxa.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/defaxisirupukaxutu.pdfIn PDF document text
    • https://kratky.eu/files/file/rometokezajolu.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/ruwiwetuxatusuga.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/86818980841.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/52985315579.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/18691321906.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/dotefuzasomoxevarewezoni.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383b3966172---78347065185.pdfIn PDF document text
    • http://poorclarescork.ie/images/bovelirenuruzojevepusi.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/30270664146.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/503893325.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/gasuraforemupuxu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D0 9996 bytes
SHA-256: 68acf020b95527dd9588b9e77a7cc3115875514ce50da37ec2977aab1890ec8a
font_01_sfnt_off0000ec1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1E 18372 bytes
SHA-256: a22b2014a26b7258db7565a15ce896542dd1fbfd81a98275ca4fea9b34d9adf5
font_02_sfnt_off00011a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1