Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa69d5ffb8e3f423…

MALICIOUS

PDF

82.6 KB Created: 2021-06-26 02:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e7ee7d4465b6858019d12ba7cd36fa78 SHA-1: 1aa8bd6728d098ecd4d967210f4117eb6e5b6ac7 SHA-256: fa69d5ffb8e3f4236781a7a68992d4f566ef041b3c1411abe8a16def84efa6fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it's a link farm pointing to compromised WordPress sites and disposable hosting. The PDF contains numerous embedded URLs, suggesting a phishing or malware distribution lure. No scripts were extracted, but the presence of external links and the overall structure strongly indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=bugs+bunny+orchestra PDF link annotation
    • http://files.ibiza-ferien.de/file/81889236490.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/68t9fd36rao75294rc3ukqjn4l/ninibol.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/dec48a918d84555fdaf2a594eef1ac99/7861741616.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/86308147468.pdfIn PDF document text
    • http://teplospectr.ru/images/files/32356309077.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/66754391207.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/jawodokun.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/93349609047.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a305f7a8b5d---53780243810.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e944eded4---pibugofakutoraxavol.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/6sl1poe3fua0lgjuje3ashgutm/44894868709.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/390a8ac3a2e547e2b88ac73910850d68/916091662.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/73531125681.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6613b43be9---83674996566.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/57477315028.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/pakifewaliwewufelexupodop.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/4nnbmor1rvt2hb0jb6qipvqfps/losapojubivafisejumemej.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e808ccc42e---10178892458.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/pazanivanumikeberipinum.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/o155pf80hi7t901bgvfljp0u06/99980097144.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/33bc6dea3e8be56db5a67d9499e9cc12/lofus.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/39538303951.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/78328782091.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_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 17932 bytes
SHA-256: 67193f6d6fd902dc4cbac698e4a4131c66c68004480ba1f67ce44b13903de6a2
font_01_sfnt_off00010c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C56 10780 bytes
SHA-256: 67c17f3dd9f19d66556d03fbf702b8e9f92eca4d618cfc00615562c76c502a94
font_02_sfnt_off0001253d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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