Malicious PDF — malware analysis report

Static analysis result for SHA-256 120d5b5bc4282337…

MALICIOUS

PDF

91.1 KB Created: 2021-08-11 19:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d969be71bef7b719487b0fbf01e84407 SHA-1: d7f8219015ff2189d84ec78bad31411166c43a2e SHA-256: 120d5b5bc4282337ed062599926e6a2f3f036940857395b57965371cb08f9b4a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://archism.ru/uplcv?utm_term=julius+caesar+act+4+scene+3+quotes PDF link annotation
    • https://bahia-group.com/ckfinder/userfiles/files/mowilin.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098bc77d00aa---naretoretuzisezifobumeduw.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/wujamakopu.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/54c0e74d783ed00d8bcce236808216d7/87177636479.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/21f61203d9a14f2e7b2d703e830af4a1/runododapujavinusig.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f83a696bec---kufutilobarizom.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/5ji3t9t6lskd1e53eps2vpthdc/pixowolavomisubileboz.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/1857006807.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/26827447890.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/j81mnhd14pjebmse1tk4nj5g47/wosipukavoti.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d48d256c30b---22022822542.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/tcs59q1f1ll1c8quk6g833h96q/voxogufamimatinapubi.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/56976383162.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/bobesanak.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/51408797121.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/47953769832.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/ripogisaniradinuno.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/30460614614.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/dgfu2uof8ij52ape7mequlu4o1/lumagitujadodawebugivuri.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/36283494220.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/50596683112.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/39230080441.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_off0001026a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 16752 bytes
SHA-256: f3ba7cd7be89fa8d7d7bf160e5bbb1f5f63b2c2dff49a7462c33eb68455c6471
font_01_sfnt_off00012db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB3 10708 bytes
SHA-256: b9d1924404e1411d18915dd07ad9d3680ba8a65c82994913da832624dfe4d1f1
font_02_sfnt_off00014687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14687 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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