Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce48dd9a5fb41c4…

MALICIOUS

PDF

125.7 KB Created: 2021-07-04 04:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e146d48f84a4dedd2bf112b653c3e54f SHA-1: 63b89e432a30069da81903bb0f86aed2b31a2224 SHA-256: dce48dd9a5fb41c488376c1e3e6fc80bfb79b86a0d148879b382b2f42b789f7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external URIs and link farms pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of these links and the overall structure indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://oniceh.ru/uplcv?utm_term=answer+the+phone+in+japanese PDF link annotation
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b42164a4334---gupapukuxax.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/65e9e7444e74c33709a37ace1595f61d/36463210666.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cb28c98b4---73488112102.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f07c3479e---85154775775.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/08573a9d140adb6f78295818453ef571/boperojejasuduzobe.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7571b3062---moxoxeluratolibigedumi.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad5945e468---godijokelamixumenix.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160717de31524c---jigikirabonapiwip.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c900c82a791---gerovifipudedera.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/8affo4drt6magfsf23r0hj8f9c/gasiduz.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d35d586b91---36523225543.pdfIn PDF document text
    • https://bataretak.com/img/files/file/kutanilavulexefovovot.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/78af7c2e14912053aecdc8088f878a50/jipidujutivakux.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/2a1446716231f0e78c2d2e05c480bf32/29852315354.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/34874617115.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e12bdb1764---29004274294.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b083c1b2221---benanazepiduxudodizawupi.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/mc1d93vkcg5pc2jd61rmp364j4/kowuzaruvinogowovade.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca2c44c810---77937604585.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/bba9dad0a6fe4235ca5586c63e93acfb/tenamukidagidemenig.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/10a7d1ea5aceb45bd1866d0f801f9bdf/87140131225.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17030 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18841 16628 bytes
SHA-256: 515a2debce654c0678bcfa1c38d74bf2beb023a7aa5bc180109223a2b36ea580
font_02_sfnt_off00019fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FCA 20224 bytes
SHA-256: b9fc1101ed7be01cea261d5c821ba2394d6cc80688484ddc8c7deb9e6bb9ef2d
font_03_sfnt_off0001d1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1B4 10500 bytes
SHA-256: 5c13ae543c96d57e1015aa18dde303b76c22b0c70112ade4421b4a219ac970a4