Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d8ad92863e7592…

MALICIOUS

PDF

74.9 KB Created: 2021-09-07 14:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a7ed1c0084bb59095d74e54cfddc59ae SHA-1: 60beb17fce97eb0899588ddfdd8d3c773d3ec7ae SHA-256: e8d8ad92863e7592d4d8225c5f4e8de57e146483a478738cf91e261efaf11879
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous links to external websites, many hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of external links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pistant.ru/uplcv?utm_term=pet+writing+part+2+exercises+pdf PDF link annotation
    • http://ppogrimall.com/upload/editor_image/file/powosafubejifimera.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/zugilunatukugumazegomazar.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/53139071400.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/10142630807.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/62484506224.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/lewemibujodugazigawu.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/04f8a0a4900c0fea12d9a9eaf94d23d9/sozudexatusoxumarezewovuf.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/30418585655.pdfIn PDF document text
    • https://tcremich.lu/files/files/90890915971.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/tosilugodilugavogewani.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/piropafu.pdfIn PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/ruzivuponejajesobepi.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/subixom.pdfIn PDF document text
    • http://servmed.net/userfiles/file/kodazabewinosazadariva.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/59234233862.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/kedivasaranu.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/41861260435.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608902809d453---sideridegeluwazemitopix.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbb8e5b640---57021476847.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c51c321be8f---1161497395.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/8962840640.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607597be156cf---nevosiniwowupozenaxu.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/fugakamujolevuxox.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/78990535095.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_off0000c048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC048 10940 bytes
SHA-256: 45530ce9352c27ab04f0c3d43b63f3bd81cd5b3b534d1e0d3d6ee79bfea61a36
font_01_sfnt_off0000d9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B5 16928 bytes
SHA-256: b1432c98e5d93a19800aec8033e38cd2cff253ef23dfb7790503738a8c70cf38
font_02_sfnt_off000105bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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