Malicious PDF — malware analysis report

Static analysis result for SHA-256 378420d04cd87cd8…

MALICIOUS

PDF

91.1 KB Created: 2021-08-16 08:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 90cc9ec339c1fa6796b278e93fc361a4 SHA-1: dc669c72959dbe02d6ab129a5245ce93f70c36af SHA-256: 378420d04cd87cd8eaf662df704c52c4912eb22fe88c3219e995fa078e9e042d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a malicious PDF detected by ClamAV as a phishing trojan. It contains embedded JavaScript and a link farm pointing to multiple compromised websites, likely intended to phish users. The PDF structure and embedded JavaScript suggest an attempt to redirect users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

Heuristics 7

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=telecharger+carte+routi%C3%A8re+du+maroc+pdf PDF link annotation
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/240mrdvqufv83519oaubeosuij/jesoledot.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/a941e6234520bdd7a8f2d80966bde93b/noxifurafeziwamefilusizog.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25474cf688---79480290789.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/6879eea6c47d416669e2d96fd094405e/gozazix.pdfIn PDF document text
    • https://ortechindustries.ca/ci/userfiles/files/nojiv.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/revorabab.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ae507b614---82643776070.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/44274745265.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/nurerinem.pdfIn PDF document text
    • https://777mto.org/contents//files/lawixub.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/a6ntn575cnp5nij08oc5rpptqf/19597320290.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160afd05a8de21---86499570983.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/84632455660.pdfIn PDF document text
    • http://gardnersunited.com/clients/e/eb/eb3320446930dd457027df34457c622b/File/67764961086.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/6d94363a0455a65be4f208263196c155/64830215948.pdfIn PDF document text
    • http://project-st.ru/userfiles/file/bosunafeberilo.pdfIn PDF document text
    • http://dichvu12h.net/userfiles/file/47909975057.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/j84v2hltnpoqqftkt5mcuej8fd/69441745136.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/5cd5749ee0236ef51d8bd4600905a02a/kitonivekiwewolexel.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078f73699355---3717828495.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/weloxororobixag.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/98364348837.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832781c4350---fobuzomakadosizitase.pdfIn PDF document text
    • https://123natura.com/stockages/files/kokumugorezuxutumijakajok.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/4pfu6ovnur1j3m77l5kkcqmlj6/42023880096.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6465065928---43860561240.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_off0000e2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A5 11012 bytes
SHA-256: 62d6a3d55a5dc996d3df35ddb3f4e0fce4ca670354a206a55c9c56cd1669060e
font_01_sfnt_off0000fbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 17464 bytes
SHA-256: 75753e79bba8e0727529332139473a8b1701024a6aa9cbd1b843d9349a0f280b
font_02_sfnt_off0001136e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B80 19064 bytes
SHA-256: a5350ca5c9912f63c7f907c9dd4c993aee316cb4eea6c13d2db1ae3b510166ba