Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4db3a061e74bcac…

MALICIOUS

PDF

102.1 KB Created: 2021-09-18 12:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 96d5c46e80147fa9d87bee594fb4ed15 SHA-1: afe5d0000a6c90273dc12192981b91d382e629c4 SHA-256: d4db3a061e74bcac1ad1702cd1149dc36e49a5cef875121a7fa1ce794f3881d1
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://queure.ru/uplcv?utm_term=pokemon+randomizer+download PDF link annotation
    • http://geonatlife.es/ckfinder/userfiles/files/5315850347.pdfIn PDF document text
    • http://girlstown.org/files/js/ckfinder/userfiles/files/raxefidebelolugosop.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/44727141370.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/90693659186.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/14390910555.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/topefow.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/92304659638.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210906140305.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/85736658563.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/lowule.pdfIn PDF document text
    • https://roshnaai.com/ckfinder/userfiles/files/xerabiworulukutox.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/lopukafiwewod.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/xobepomu.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/59851543402.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/magam.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/77130765307.pdfIn PDF document text
    • https://gentrilieu.vn/userfiles/file/wumilakiduxo.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132719865430---24742338520.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/sibalerusa.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/53163192893.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613138597834f---felukopanudexixifivemira.pdfIn PDF document text
    • http://wwstationery.com/files/file/mejamibesawogazixi.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/gikem.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/3380386516.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://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_off00012a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A82 10380 bytes
SHA-256: 9adb9558b117bfcbeaa3da919c6d980a859f15459ed649935b0433e6e15702fd
font_01_sfnt_off000141f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F6 19288 bytes
SHA-256: 530bfc2b3927dee5842fd1e9eb83cca7abfcf82ad33a0bb4a84ae29fdf783a0c
font_02_sfnt_off00017451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17451 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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