Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf92d7c9ffa61b13…

MALICIOUS

PDF

69.2 KB Created: 2021-09-28 08:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c278f171aea4565330a4ec4cdd7bbacf SHA-1: dc50a7ab3af6d38d55373cf34b75a5b0da1253f9 SHA-256: cf92d7c9ffa61b131c30f7c71b030e0670f4d866e307625ac4d40a01f586252a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and exhibits characteristics of a phishing lure. It contains embedded JavaScript and multiple external URIs, some pointing to IP addresses, which are likely used to download further malicious content or redirect users to phishing sites. The document's structure and content suggest it is designed to trick users into clicking links that lead to malware or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://huntic.ru/uplcv?utm_term=free+movie+downloads+no+registration PDF link annotation
    • http://etepi.pt/js/ckfinder/userfiles/files/ridanelogosi.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/kumajadeda.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/nuxosigediw.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/fedotirufipu.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/52646659709.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/67379046426.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/67627760451.pdfIn PDF document text
    • http://fjsxsx558.com/upload/files/63858708649.pdfIn PDF document text
    • https://zahidnawaz.com/UploadedImages/image/sunedusezuli.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/jejojitefejekomazukusak.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/12997763587.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/10271660723.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/11016707161.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210922_891167B0D9B9385E.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/9821567684.pdfIn PDF document text
    • https://hotelangela.hu/userfiles/file/50646959798.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/julogebinofesodafanaguw.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/79436764184.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a1bc463e8---3021316916.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021910_6056_974.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d802175556---46572241861.pdfPDF link annotation
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/be51bfc9d05dfd7b96445a220facc8f0/64050256313.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/4975317392.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/30165225614.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210915200948.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_off0000b37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB37D 14028 bytes
SHA-256: 2ac00fa7edfef1ebae161a4094d06aa775c806256530175e23366e729905c469
font_01_sfnt_off0000d65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65E 10720 bytes
SHA-256: 3aed5a26790e3682a3507e16a12ae217f151ce8ff94c5abdfed946a7adc2c111
font_02_sfnt_off0000eecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1