Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf25a5f6a9304a1…

MALICIOUS

PDF

85.1 KB Created: 2021-09-05 01:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2a3898de1a96d287a478370e76a456d2 SHA-1: cef0ad691d0ff9b936c1a7f4243a2f9be4311cdd SHA-256: ccf25a5f6a9304a1a81154ff34bf6d271ec18748e9ef80a766c9b105f2d29280
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. No scripts were extracted, but the presence of numerous external links strongly indicates a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://irlanc.ru/uplcv?utm_term=online+pdf+to+powerpoint+presentation+converter PDF link annotation
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/loruliragojulegomador.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/fatovimizizopodunurarukam.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/lv8akln2muptomcu8rjd2kdahv/29420264980.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/49981643273.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/3cbdd559378666ae0a89dc12639479ee/tikadozokatinebafivozuler.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/fakasam.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94180316b---tuvarebivazowakiludezuxam.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/5194063058.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/80848655918.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/3e7i6p63rbuq89da7ir7rojn3c/saxeno.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/92b33f04fb200d5de7e7b1a8404b86ca/28715508526.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf2f5e2b4---sozukuxateliva.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090289f2a18b---55669181899.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/wawewuganolujozasufipe.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/86bj4cupo3supr948sb1oftab3/21206301166.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d8daf2dca9b3e097b8037473ea8dbe71/vubafukikavimegizixekit.pdfIn PDF document text
    • http://chpcentre.com/files/file/kutigoro.pdfIn PDF document text
    • http://aktien-analyse.de/images/File/lenuvafijituvedumutebew.pdfIn PDF document text
    • https://yellowstonewildlife.com/bomuvusa.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0f3a1fcc2b2b07c9282b76011eea6625/wemufelimitesaxobimenuma.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/pm6hba1t6lr63nik3chkndssgc/81147004751.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/sajugijitugutawir.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609870fe5bd50---tenefarukisurarobofakex.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ac923bc96---libofubizibisikekidor.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_off0000e620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE37 10792 bytes
SHA-256: b0a12d1030c3bd0159443727f76384143ae34395aa407257c3aea79c996ca5f6
font_02_sfnt_off00011747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11747 17508 bytes
SHA-256: dcefe0e384398bf60bd9d84a3fedd139ef40544301f83c13f3e61af931a95377

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