Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f471b227a122e5…

MALICIOUS

PDF

75.0 KB Created: 2021-09-09 09:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: da600e84d4eab3fc13ec4d987f462332 SHA-1: 4a01025abd621a045d25d1de31c9fd157a7ccfc3 SHA-256: e6f471b227a122e513ae67162f4ee4e9ac54735ac75afbb1155d6d7e0ef38267
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to direct users to malicious content or phishing sites. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common method for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://fitsiluet.cz/data/file/bozapedoroderuweputage.pdf In PDF document text
    • https://mamap.in/ci/userfiles/files/latodowi.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/7949669dc64e1ecb27a72d25c761d4b0/surutof.pdfIn PDF document text
    • http://chayka-svg.ru/files/vepebib.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210905_13FE956F336A04CC.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/jjl522p9l9bjge3m6qma74ukah/24551057829.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/lezexetelodivewilifadij.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/tafofodev.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161349a4e19a3d---95625542708.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/gujekusumorapinudokuk.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/firega.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/72880142858.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/2024699503.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210908_030915.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/jodati.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/tutineku.pdfIn PDF document text
    • https://medius.sk/userfiles/file/55236591654.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/17712163774.pdfIn PDF document text
    • https://wsbtitan.com/images/file/48416705354.pdfIn PDF document text
    • http://protectakoteasia.com/ckfinder/userfiles/files/17116221484.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/zisipuwugi.pdfIn PDF document text
    • http://belovosushi.ru/files/68441549731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=download+dream+league+soccer+mod+pes+2018+apk+data+obbPDF link annotation
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/refezobojoledipo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB53E 16292 bytes
SHA-256: 7a5b12d903a917ba337299c8b4b9a67c4cbb09eda19a66b71dcd51f84e418833
font_01_sfnt_off0000df2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2B 11688 bytes
SHA-256: 971b2411becdfa1b0af737af62b97b9ee21a19dcdf573180cf2246f8655a6d3e
font_02_sfnt_off0000fac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC7 2588 bytes
SHA-256: 4dc94dbb2648e87467f7b71575ef1506170ba0cce5649935e645cbf43761a357
font_03_sfnt_off000105d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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