Malicious PDF — malware analysis report

Static analysis result for SHA-256 341126ea7261171e…

MALICIOUS

PDF

98.3 KB Created: 2021-08-14 00:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: e74f0e8b7d39e9cd458551c8038afc17 SHA-1: 350cdac132e5da75103850b47f59924a72837cfc SHA-256: 341126ea7261171e9f1fbb72cef24f5beb9791a2340e2a15d6f7a320fa47c05c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, though not directly analyzed for specific actions, further supports the malicious intent of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://synerhu.ru/uplcv?utm_term=mash+cast+still+alive+2019 PDF link annotation
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607768c82fb4a---jesopisakolikoravefu.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/jihkoe0nfec6l8pj2e26fi196r/32227880176.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aac7f3c293---82778802763.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/kovaf.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/b817b554ff0091b007be03d670083894/77623360360.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160e166626fd50---lefoximagivigelikekorik.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/sawewexumefok.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/tezedatupitaxizebozir.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/68652878328.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083bde2a0a5e---29381664474.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/melijobiz.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/d47740208e2eaf2be6f318c2697c6e92/15820149934.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/t3aa17rnegjmul2u2qqq68f76t/famafazagulipalute.pdfIn PDF document text
    • https://dafelia.com/files/7401218120.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/sixopagotuxudabu.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/tikametefomukonab.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/zuwovezoluwuxovitawul.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/21471889377.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/tr4bg9iei7tu08ik6p5kl3v1u3/xebinaketo.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/9478c0ab58b5d21cd385aab9055827d7/22561955684.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/76690006993.pdfIn PDF document text
    • http://freewest.at/72885074963.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/kujavonebalexenamapib.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/6i2c11iq1r4s2vge53c3phobd2/jemigabeledalo.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_off000119be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BE 10524 bytes
SHA-256: 48b43b5edf9c609c0edcecfc3258edebd9e6248938072d711fbcf2a1a3b103c1
font_01_sfnt_off00013207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13207 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A19 17748 bytes
SHA-256: 1d1ba2f3215996423edf9465e1c05b5886d5a5dfa4434f58543a00b34f415bc9

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