Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fde8bce46a30b6…

MALICIOUS

PDF

111.0 KB Created: 2021-09-19 00:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8e3229b958582bd2469220083074eedb SHA-1: 78b55d7b8981633b8cce4ff6003c79d9f7f9c44e SHA-256: e5fde8bce46a30b6f8e8c62217cc9d29c5e45545e4bb89f85843458e2bfd638a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the presence of external URIs and the overall structure suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=talvar+movie+online PDF link annotation
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/25215e03fbb0adbf061efd5734b19f07/93682251872.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613beeffa9799---55932322373.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/ribikigumagavizidesivoji.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/61596307632.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/2994509474.pdfIn PDF document text
    • https://stl-log.com/htdocs/cljr/data/files/jivazazovusodaga.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/pafudedubuvegimiker.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210913_111819.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/731fd659de44a85f8af7daa44572d94b/10041781401.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/b1119dbd9db545907d2f3e0c0e719e4b/webokapizesavi.pdfIn PDF document text
    • https://bayihoki99.com/contents/files/megogotikutavugukikawusub.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/fidanelirifaw.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210913190657.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/doxokited.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/zosuzipikutuvire.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/kefoborixiwakasemas.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/rowinek.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/e94ff0a4b5101b4970d304896acf4767/gejiwujigokojegu.pdfIn PDF document text
    • http://robbes.nl/media/files/kigagapigobafafor.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/pekazud.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/13386567769.pdfIn PDF document text
    • http://chetaomaynganhnhua.com/uploads/files/rivewi.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/67564566117.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_off0001500b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1500B 18552 bytes
SHA-256: d89d30510fc7f35919ea38daaf04bc4f208d0716a5dd3adf25fc0cf3b39e6ff4
font_01_sfnt_off00018035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18035 10032 bytes
SHA-256: 75675b398685ee46b6193cf71775bc84532986c9eea67c996b094207cfe03c8e
font_02_sfnt_off00019672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19672 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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