Malicious PDF — malware analysis report

Static analysis result for SHA-256 0480766b1f175b4a…

MALICIOUS

PDF

85.4 KB Created: 2021-09-18 02:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b86f4e5f49a7b9aa237e621cfddc121a SHA-1: c1cee4761991cce1bf6c15b512f7ce521f3b64ff SHA-256: 0480766b1f175b4a6e03c140a882304e32bd66c626360d788dce8ee4cde148ea
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these redirects. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://recepti.plovdivweek.com/js/ckfinder/userfiles/files/60423871948.pdf In PDF document text
    • http://gocoachfox.com/userfiles/file/1770996802.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca793b64e2---vunarogidigagip.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/8595139333.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/9e75rcpp7vtfbj5pllpoovjk5s/nurusikoxoxetadoso.pdfIn PDF document text
    • http://tajilin.com/upload/files/56970991193.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/mofalepotug.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/15967848150.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/nejuparuvolote.pdfIn PDF document text
    • http://totoumi.jp/upload/file/votubigagaxatebib.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/5k82hvop4cbqn36j1joi97vgf4/26712995574.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/29185372531.pdfIn PDF document text
    • https://kulittelor.com/contents/files/30405905632.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/ae516c57e8bd85f26c24cb9c54f4de67/24869816981.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/disizefizebuxejibazewase.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/95231525472.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/46288120699.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/tibaxomusonimif.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/lipete.pdfIn PDF document text
    • http://kahasat.cz/data/file/koronifewukesomudatal.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/nuzakakinexinorufometukag.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/memurorunavipedotuganumer.pdfIn PDF document text
    • https://psihodesk.ro/ckfinder/userfiles/files/nexuwupofobef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=can+i+use+siri+on+my+android+phonePDF link annotation
    • 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_off0000e8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 10760 bytes
SHA-256: ac2bc91cd3b30575c4541ac15efaf32b505be9876ff6c4e734be03d696ad0dac
font_01_sfnt_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 17620 bytes
SHA-256: 61abba30d9d457548d634d276e7fee84e0a1007fbb21eadefbf9ec79fdc25280
font_02_sfnt_off00012f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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