Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60e4c5882f3574f…

MALICIOUS

PDF

75.0 KB Created: 2021-09-24 01:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 06b1cc69b847eef35830ac368b8eb0d7 SHA-1: 6c4e3843c55a8b9ecf36892bf0ba4547b0778323 SHA-256: e60e4c5882f3574f494ffee57486c64cfdf94c203205d81111a8424ff2aa8481
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of ClamAV detection and ML classification as malicious, along with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic, strongly indicates a malicious intent. The embedded URL `https://wastran.ru/uplcv?utm_term=how+to+enable+javascript+on+a+google+locked+phone` further supports the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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
  • 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.
  • 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://wastran.ru/uplcv?utm_term=how+to+enable+javascript+on+a+google+locked+phone PDF link annotation
    • http://ifaistos.reality.gr/~triantaf/images/file/wotosexolu.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/saxixilupilomigezulexerot.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/gilisokitexa.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/tirudekugitofowi.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/78491819247.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307f7270851---87039968069.pdfIn PDF document text
    • https://zemtechnika.lt/public/site/0files/54809166077.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/09296bf405e2d02578b8cece0d379219/gunisuvoxavoliw.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109090719232098.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/64237352325.pdfIn PDF document text
    • http://samtekelektrik.com/files/71062262770.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/54425856698.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/43840560323.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/67328794725.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/22225361842.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4d79798a7---pujabipotitewasuketilipi.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/gusutavamoberi.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/99519632661.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/nawexofubowojogoxe.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4fa3c4ba6---lixegiwebiropeg.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/kuvalepas.pdfIn PDF document text
    • https://rajakeempat.com/contents/files/jefogifu.pdfIn PDF document text
    • https://novsport.com/content/File/kavawapurip.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/potojeximuvavadasakiw.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/siguzajoleroza.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/josajasef.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_off0000bcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FC 17464 bytes
SHA-256: 9016a4f8685a8f695573df92a9347c1debe7d04aa7352d30ffc777e26b2ae39e
font_02_sfnt_off0001020e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020E 11300 bytes
SHA-256: cf74c931d8781ddf5b1f859856067035621bd31ba9612fbdb38c114ca3e481e8