Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5946f44e0e42dcc…

MALICIOUS

PDF

84.5 KB Created: 2021-07-16 20:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9c0720c23a4a67df56de2cc4884e95ca SHA-1: 2c25ea3c75cd7fa0ce383513e42e9a1188415828 SHA-256: e5946f44e0e42dccc56f3368e3b294629bf0116365a755a9562605374273a6e3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://evpersoneli.net/ev-personeli/file/19872496823.pdf In PDF document text
    • http://asja-doll.ru/userfiles/file/12856372789.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc0847a17d---92695138565.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/f602742719c61bc28eb0c617f509c745/56681758226.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/verezinobigijig.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b7571e8435e---59387426471.pdfIn PDF document text
    • http://whitepurdeespires.com/clients/b/ba/ba703c466af5784ee38134b9d09df413/File/lupixagegudiwojufinogom.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/wekufekojirosisaridetoz.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/19969809960.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5883ed555---niwuditumireropupis.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/zegokevelegatuzob.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/28167639914.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/guzejeton.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/zemesejobexofejigazixa.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/682d5028b9c8c036c8c8687bc94fe68a/loduzoriromofavapinus.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073445c28774---36560300839.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/0c5db14b383060c3bd7583bd47be10fc/kevagowexogelefoza.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/26395675855.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085a18e39263---52801381647.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/makixuwuvekikagokam.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/c31588b855c37d712336dbb4945dfd1b/tanifuzadazuk.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/i56s05v9n527du6nqvgcltiiuh/didum.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/2fcfd85188c379a65c29b2b8444803c2/57849631668.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609410a9a3936---96554017625.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160abbc1d6f98d---60910624128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=small+intramural+fibroidPDF link annotation
    • 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_off0000ea50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA50 10528 bytes
SHA-256: 689c512fbad8ec26063f849a00e235c4734d7a716adfad02ff9a5c9cc503a11a
font_01_sfnt_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 16420 bytes
SHA-256: 1e7c08586090b803717e2ae4a8bcdf427da770758553c4577e6295590f6a0566
font_02_sfnt_off00012cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1