Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6f667b3aa6d403…

MALICIOUS

PDF

78.5 KB Created: 2021-09-03 05:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ccf076c49aac0b96d7456811d0dbac6d SHA-1: ccc6fd71f665ef7920d75750199f7d6ed5d6d6a0 SHA-256: bc6f667b3aa6d4033d04456e7a98f68f0c6f29443b0d59328f3c48454f748226
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, but the structure and URL analysis are sufficient to infer a malicious link-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609f572a2b169---75005808513.pdf In PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/94340748142.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/9066396348.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/turezoxogefugezezexivupe.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/xiwuwuditisosanutezotosip.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/60091732fbc43ad52404f1ccd59add65/soxepifoluvisu.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/9d88df7ad096c650adca92715a7cb670/sapadugukidizupu.pdfIn PDF document text
    • https://anjingliar.com/contents//files/86330053351.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/luzewojadewukofupun.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/bosedakunemudurisit.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/zilateji.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082671ada3e3---rixumanosur.pdfIn PDF document text
    • http://ciskmv.com/css/file/74570595102.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64226a747c---92733625709.pdfIn PDF document text
    • http://khonggiansachhanoi.vn/uploads/files/90763777774.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16104a07ab2858---vaziwusugoxesoza.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/rorel.pdfIn PDF document text
    • https://camelcarpet.org/d/files/17366729824.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0cebd7380---73067340317.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/sapevodibos.pdfIn PDF document text
    • http://potlista.com/file/files/50499695952.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c97e022883---43424255851.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705a36a778f---popofuxezizame.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/dasatibalamubagijemus.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/3722284165.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fba620ef68f---rewerubuvabilizajali.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/10699976340.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=plant+taxonomy+book+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F2 10616 bytes
SHA-256: add5d94f48171275767530a1cb3189bfd09761f141d27c611ddee18dc64338e2
font_02_sfnt_off0001010c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010C 16500 bytes
SHA-256: a98dae3b444556622b99d74ba3e0df027f21b9ae2b89f5f4f209a647057ac9f3

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