Malicious PDF — malware analysis report

Static analysis result for SHA-256 bceebfcf6d3249b4…

MALICIOUS

PDF

83.5 KB Created: 2021-07-02 17:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 06af2ad2c7c6ad8d477df3053930f3c5 SHA-1: 837ddb870c613c1866a1f264df11c5a539d1534b SHA-256: bceebfcf6d3249b4379d86202a6ef7d9c85140c80be5bcef914a9e4d75dbc17b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The PDF itself does not contain executable scripts, but its primary function appears to be directing users to potentially harmful external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/38ipqv6pkj367ifp132b0qv3th/kigewuzosizoweran.pdf In PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff79ee02cf---lenogujuzuwiwemolaxig.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/12186277851.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/67527016170.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/dngr7rd0ktibdrvl3l5eaqc3p7/xagasadox.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/39437519168.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/dudugatubif.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb55e3654e---83547414550.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/ba170001df147369fed143f92d92f1c5/24330290764.pdfIn PDF document text
    • http://goref.ru/files/file/vazolosemisopux.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/qjih04k88fh4aiebublm9g7hfm/jiginuviw.pdfIn PDF document text
    • http://yuhongzg.com/d/files/12348390786.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/pofese.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/11688525931.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/18526811250.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/wevekemusowazusijosi.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0f1e6d649fe51cfeb7cd7ce58be39019/60961899531.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/pukixajoboniwem.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32366396c---65319042595.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960690dae44---27265241336.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1620768775.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=greenstar+27i+system+compact+manualPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/9e7d962738ddd140d275d30745743f5e/tomaxotadazolipupajo.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_off0000ccc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 10956 bytes
SHA-256: b93472019f003eedd6bee81a7e94d5b055557f5278998a59287142f0654453bd
font_02_sfnt_off0000fe6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6D 16192 bytes
SHA-256: 97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd
font_03_sfnt_off000113f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F5 16464 bytes
SHA-256: 841ec9a233cf4ca9a66033d1f7706351cdf7cb6a207167cedc74f1f47c41c5f5

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