Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0517255972de181…

MALICIOUS

PDF

79.5 KB Created: 2021-09-15 15:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4b4f4b55199c4b4fad8876439ac37a86 SHA-1: bdcc8f043758638bdf4607a9e0257d60cba714e0 SHA-256: e0517255972de181dc0f28636fa44428b15bebe267c225656b48e485d5349c24
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be instructing users to open a password-protected archive, a common tactic to bypass security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://inwebjor.ru/uplcv?utm_term=driver+viper4android+zip PDF link annotation
    • http://contelex.it/userfiles/files/25340872742.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/golewigetizolunut.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/25839646776.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/kisegijitapupafonaxizaj.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133cb29acdab---3185463983.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/42537711298.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613894b0ae4dd.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109020830451420.pdfIn PDF document text
    • http://mega.kz/media/upload/files/9496569554.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/582d936a776e03f9a94433cf48ff8ea2/kuvapozozuk.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/najupimolodabinizaki.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/bidowinozanisaduwobomeban.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161370a6dd4a2e---federosajix.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/hmgnbmfqre0c1ortbcnvf88ujk/64670207689.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/42021185089.pdfIn PDF document text
    • http://sjanzee.nl/file/marozokuritumiwepeb.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133aeda2ebc4---69637966338.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/denemaxefotesomiwokadevut.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/5313ad8621e5cce8876a52fdc7e1e8ca/7878089976.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/1603502881.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/xijes.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/fba5a95780bbbf3e4c7bc96526d7baac/82583687490.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD498 10280 bytes
SHA-256: bc69a1f5d348191c334a61a5b606b3ee6b3b8b367e046b064d582bcd144ed406
font_01_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 17752 bytes
SHA-256: 96aeb2ce241a7dd682d2022985758f0fdc74a90a25a29517018df5b2a20d6e8a
font_02_sfnt_off00011945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11945 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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