Malicious PDF — malware analysis report

Static analysis result for SHA-256 356801e82570a4ad…

MALICIOUS

PDF

75.6 KB Created: 2021-09-03 09:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e151ea243f9a897502ddc2e43030572c SHA-1: 5e932189fe7be9364660109d236216533938ad88 SHA-256: 356801e82570a4adc30d131f64f5457b06ce9022ffbe1222ab103e8a086c43d1
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. The heuristics indicate a payment redirection lure, suggesting the document is designed to trick users into updating financial details. The embedded JavaScript likely facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://garglob.ru/uplcv?utm_term=sbi+atm+card+request+form+pdf PDF link annotation
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2be05df338---laxonigekezirevivixew.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/73863363112.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeeb9d1d04---62232298969.pdfIn PDF document text
    • http://195exim.com/datas/files/zizafosepaxonafoliji.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/2shnk1c17tjoeqtgb779uukvfr/pazozebejodomasobe.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/8d877badd334c17ea6ea0606d3f8a136/25977495838.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/30716729696.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/faraxirudu.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160afe05566d69---tudifigoriwa.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/juzesirebimezedipoba.pdfIn PDF document text
    • http://wtmongolia.com/materials/file/42130387854.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f1cee929f41---78755424185.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c326acbca---fegeluj.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855e786eb6f---13088887344.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/buzimaberatidaxelunadil.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea6fe21630---38070316228.pdfIn PDF document text
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/mevudefekujuj.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16099672908dee---makedititewewupatojorawo.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/kejagunupulawovinobone.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/5084882831.pdfIn PDF document text
    • https://duel.pl/userfiles/file/palosidagasig.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/c77c0e28211f005c2509965b5cf06624/wupeduxelerixegogaxu.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/51466990461.pdfIn PDF document text
    • http://girlstown.org/files/js/ckfinder/userfiles/files/gozum.pdfIn PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/liwowevenapojevinupipiri.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_off0000c4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD6 11092 bytes
SHA-256: b02c09769b997a32b9781097066d22f222978938afaeab9d6ac6704f4da1a114
font_02_sfnt_off0000f650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF650 16464 bytes
SHA-256: f121f9346f3be130cf07a99b80cca66c6607ea8bc96226320e2d1afce6fd6303