Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec297d75eb427a1…

MALICIOUS

PDF

104.1 KB Created: 2021-06-29 10:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 785978b3dd5d79ea25f145791a11ac42 SHA-1: 3f8f1642dd5ed54443404dec43c2bd8adc93f922 SHA-256: 3ec297d75eb427a14a934760ea2da9ad018906120cdfcd4440f31550c06426b1
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier flagging strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

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://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b95030c13fc13f31addbf14558b6cd4e/rilolera.pdf In PDF document text
    • https://atesolve.com/ckfinder/userfiles/files/fodapokovazimafusimezu.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/28950372395.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/82abb5dc13737628cc63ef1dd9bfdae3/75591285408.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/levodajoxobunavegubonur.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/pazunigusatekugozu.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac48e4c0d0c---65977561669.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/buzagawol.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/f986c09a153f728953faf189327198c2/bevobimoserujalasixede.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210618141843.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfce2ce29a7---vemij.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160d375f264136---xedanogonibapebatetos.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c32d31979d7---deriganob.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/0088aeac127d8ae200f1e2091b741588/vagikamugowewibixewoji.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/odesimakibetinoweduma.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/2131400b272a8b17fa66bc5e36c51611/fanavivizuroz.pdfIn PDF document text
    • http://dgjst.com/upfile/file/durarifazafutanijasoluj.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/db973aafc09748b37f5cbb4822c67e13/pesawedadujikapu.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/xozolakuvirinoxunudole.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcb43b6d0e---pudoxiwi.pdfIn PDF document text
    • http://humanlitech.com/files/files/32857532560.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/476eb20a8c7951b5a000d6685e959763/90901347891.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c75698d5302---56849224153.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16084b0cb45714---7092857208.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/53437040904.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/27124154748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=the+gold+cupPDF 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_off0001193d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193D 16172 bytes
SHA-256: ec25a194e58310d4b4f8f98b65ed61dd143b4b8be5e3a8acd4a17d0e900953be
font_01_sfnt_off00012ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED3 20328 bytes
SHA-256: f8e7d8013fdeee46627debf3bade92d73611b01843d4e550b22b6dbde4f85e5e
font_02_sfnt_off00016277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16277 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00017a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A8E 10132 bytes
SHA-256: d2f713665b91ce1fdcda5a637bd549a7f943c5612191661601b44ac45126e945

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