Malicious PDF — malware analysis report

Static analysis result for SHA-256 be62ec30fd8874d6…

MALICIOUS

PDF

79.5 KB Created: 2021-09-04 16:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 9513fe12dac106c3d7c1a5d167eac077 SHA-1: 9f660f92b9e023fba5a2f3a645ee5cf049cd062e SHA-256: be62ec30fd8874d67d0cf46850c9c0dfb579950f7ff97c91be99d774a545b230
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains a link farm pointing to various PDF files hosted on compromised WordPress sites and disposable domains, likely serving as a lure for users to download further malicious content. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://huntic.ru/uplcv?utm_term=business+card+template+pdf+free+download PDF link annotation
    • http://xn--49s538bo8ux8c.net/userfiles/file/32665221728.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/a2dd1357b332acb5b4abd198f8df5646/tijupubakopuzajas.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/28672885974.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/161218c1de7b7b---1800658979.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/3844596478.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/12627735872.pdfIn PDF document text
    • http://guinyardfamilyreunion.com/clients/62985/File/93832089623.pdfIn PDF document text
    • http://kco.su/userfiles/file/44678388732.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/168242d49f255818c771e4bd2b56435e/gaxagosir.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/83535255233.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/64786594473.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16099fac301710---67261799627.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607859f7a61fc---mikok.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703fb6b6a69---87545694848.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/54233281281.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/zagajadilamerededem.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/0ce329eea0970db48999dad342154e4e/84344779136.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/73981635975.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/50900505753.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160846d21a2f80---nevoxenu.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/77483219739.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/13447240510.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb49b1d547---kipevi.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/70012644374.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_off0000d0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F8 11020 bytes
SHA-256: a0f6201b04ca5e2e4d1b95fa9776d416257bc03189ff12993c684452d3bf5a05
font_01_sfnt_off0000eaac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BE 17764 bytes
SHA-256: b3d3c2b36adf3d2567ff9ec0730333e48e7c816b14fe2261f64381a0ad5a1fc2

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