Malicious PDF — malware analysis report

Static analysis result for SHA-256 1310c32300d1cf9b…

MALICIOUS

PDF

115.9 KB Created: 2021-07-02 01:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1fe3451cc0d7bf602d8b47797f71037f SHA-1: 464797a7f9dbc5bad8b20b5f9a86636b777c24b9 SHA-256: 1310c32300d1cf9b50c47dd4d7530964ecd7271c826cac1d54896df4acb0b74c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised websites, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the structure and embedded URLs suggest the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87644159983.pdf In PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/mgj3kokpcev7bu8tv8j226oeok/juzawadenomef.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/1hvg43vgli96r02e6esek06fj3/naxegemisopag.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16085251a251b0---16027349023.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/cb7e436ca33f9c9411720618896431e7/24526663130.pdfIn PDF document text
    • http://allycatering.com/userfiles/68483148217.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746c1ede6d7---78904304341.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/xopipizeger.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c50333128d6---91509548049.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734adbc16b7---29563603212.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/90001092119.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07e8267c4f---gejuvefubibugelovupa.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210617044320.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/88537598747.pdfIn PDF document text
    • http://iworking.vn/uploads/files/59524993102.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080b31c08fc7---69942433596.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/50743991947.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761373839ae---62660435585.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160809198bbd33---fosolulibupitexolun.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/lesalufimerububinikojen.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/9243290fdcd48a8f8b89457c4d48803d/60667842358.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ct8frsq0mg6pse43h6hh92jjcg/97494288003.pdfIn PDF document text
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/56268567954.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=fundamental+principles+of+the+constitutionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000146f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F03 17632 bytes
SHA-256: 9662918d459e3082c77d5df6a881153f3072aaee9821e4aedfa8b2c1cb69d8f8
font_02_sfnt_off00017a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A11 17928 bytes
SHA-256: ea6319357c5054aff966ed5764da6cd0ce6f7d572b688a4b2a3da5b6a5800532
font_03_sfnt_off0001a86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A86C 10960 bytes
SHA-256: 23ab4e54216bbe3f523bf0f343a444ea8a5b3a9b3ac42246da589e71279e3844

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