Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d2dd4eaa7b9a9d…

MALICIOUS

PDF

90.6 KB Created: 2021-08-20 16:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e3777d7773aae748a3452ec64713202e SHA-1: 16f474e5438772108ab8a27676309f867b116c95 SHA-256: b0d2dd4eaa7b9a9d958efb2ff78d07b9e3d04bfa3bcc9708b8ed6496feb508b3
164 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous links pointing to compromised WordPress sites and disposable hosting, combined with a 'download button' heuristic, suggests a phishing or scam campaign designed to trick users into downloading further malware. No scripts were extracted, but the PDF structure itself is used to host and link to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9744

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/5530c2a96f0a11219ee0b9ca21324dfb/rerexuw.pdf In PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f487e22634c---17551331056.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a9f9acd9f---25772791268.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/jagafituwefulagukafiferu.pdfIn PDF document text
    • http://annabarons.lv/files/files/kamoxararonuzovi.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceb5d0ed52---wegezaw.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/88756134635.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/c3498e138e7ebc9040094d9be30059ef/14035627716.pdfIn PDF document text
    • https://citytrafik.nu/images/file/7007896157.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/2ed87fa953a78db4b449c8cc337fe9c4/36088234459.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/76102093181.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/fegeramaminipet.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/33733060024.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/galelavumiz.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d0fd03ae2---17757290582.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a870b269850---zowebufuzedesasofugedowa.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/vifomegebixivexalov.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d40d499dcbe433fedf7b4d2596bbad92/wuduxilu.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/72264494328.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071feaa3389b---lesilejudiz.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/zuwebegokukamifel.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/f5tcbsfgucr57roesfevlnrh9o/45720041498.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/31294817677.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/fenoxobezobapi.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/lofurodegaxozaxutulu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=adobe+premiere+pro+cs6+free+download+full+version+64+bitPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e11635fe08eeda803d942eea5193f0b8/77665234080.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_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 11400 bytes
SHA-256: 31adfce314ef61c943b7e83e594cbde3ec4c6b52047ecab3043aa39ad30e27f7
font_01_sfnt_off000105c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C5 19488 bytes
SHA-256: b43fd09fee3b293d9aee13f1d75d928c1e64d72775ed51ce155ce07422316027
font_02_sfnt_off000134ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134EE 3616 bytes
SHA-256: ee82a7cbb4728a7c51ce57e4bc6bdb138585bad71807ea07b85d4af8e39daee8
font_03_sfnt_off00014378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14378 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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