Malicious PDF — malware analysis report

Static analysis result for SHA-256 018697d2a0275e13…

MALICIOUS

PDF

92.1 KB Created: 2021-07-14 01:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6cfc10e11bebe9a948f834ae12bb6b5f SHA-1: 5bdcf04a6bd4bd1ba076c9d488c51c4761e10899 SHA-256: 018697d2a0275e13f372ce05389761009223d4d6f57fa0a1148b1f82ef30a1a0
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, some of which are compromised WordPress sites, suggesting an attempt to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the overall structure and URL findings point to a lure for downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dinskayarealty.ru/media/file/48892743736.pdf In PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/p4go3nr4cpubj02trh166d1dj7/81871401889.pdfIn PDF document text
    • http://rhondachem.com/d/files/lurageledisoxurazapitije.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210519211603.pdfIn PDF document text
    • http://northjerseyseniormenssoftballleague.com/clients/2/22/22e10641a135963e7b476298ec508c3c/File/79053549269.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/fiumqvmuvbq7u7vq396n03k2df/sewiz.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/983b186feed90334a8cf9bfbdd1abe52/rawutugobozovalulu.pdfIn PDF document text
    • http://zonweringbelgie.be/ckfinder/userfiles/files/nizozot.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3141aa01e---genamibilesedowilusudu.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/6410082743.pdfIn PDF document text
    • https://jurad.eu/files/file/36475542999.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081d05e7291b---zosavuwedonuwiropusotu.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/c684fa962d3bf57b039f011e585f2ed5/51096230167.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/5it1og8p1uo5v1dujv4bs37gep/bunuxuwesi.pdfIn PDF document text
    • https://sealskinz.ru/files/file/12068560167.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c9753a7a9ea009280277a36a6c4cfa34/71336950682.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/mg3ibip6vickqv57dvhqpdf043/fozejawitogugesazud.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/0c9e53266138fb2dbf27c44ef347ceda/6262360832.pdfIn PDF document text
    • http://auchli-appenzeller.ch/userfiles/files/fasavawedowevekitiwir.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/fd477132754e086add41069e6e129477/58267966688.pdfIn PDF document text
    • https://genericdiabeticteststrips.com/userfiles/files/59911425351.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/7m65ouiumf6pin76drvj1d83ul/6687115641.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a596a021839---97317778902.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/85791403210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=professional+powerpoint+infographic+templates+free+downloadPDF 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_off000104ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 11156 bytes
SHA-256: e6ab2ce021b58e562cbb003d087eedd2b82d3f465768b9b3c03b7e871f003055
font_01_sfnt_off00011eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBA 16848 bytes
SHA-256: 284a5729ad8920a6af3da78b670ef88c0a20da7b8bda556f151a6ff1f32cde80
font_02_sfnt_off00014aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1