Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c25e01874c98fc…

MALICIOUS

PDF

119.2 KB Created: 2021-07-24 08:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b26d38b0c77ac8e0f10a9e3e0c8c9e01 SHA-1: c4be75ad690b050b551c85c4241b9e2fee540a7a SHA-256: 38c25e01874c98fc1504ba6e2754f16f52c83bd8468d12e2b324420309e26ead
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading a secondary payload. The presence of a 'download button' heuristic further supports this phishing and download lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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 https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160757588ed739---63475583835.pdf In PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6bbeae396---65647098052.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/ef3343c807244560396e4e4718ba23d3/daliv.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16088fdff7b7e0---xekazaxavokumafir.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3198c8302---73746400010.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/f4ad4577d66b65996a855babfb26c7cf/43757847305.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16086b81028d72---61146398028.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/ca8fb877362fe2787d98b1c442a2e8eb/96362925959.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/if4s6mafot3j9tpsk3mgc2n8f1/fetelabegexovunonejibij.pdfIn PDF document text
    • http://agrion.org/upload/fichier/sipopelo.pdfIn PDF document text
    • http://poolprotektor.com/userfiles/file/wedogegifoboganesavijapeg.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7db9cb1ebc---76825186031.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/89206865887.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/82186492272.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/7ecb0dfeb64c477ca2c3d31af4272abd/juwujepezeripodenukuxopus.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/66675454734.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/10415808796.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/87bd7f545600e88413123c4f48451ce0/fokuraxejudopalukobes.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/9b65fbe140caeb0627317f80f295580d/63372655771.pdfIn PDF document text
    • http://mosjob.ru/images/file/40228209282.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160df1b9634c62---28710511460.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/58gdd25rs9ftjhfk2s22f66ja3/89096720094.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a38cc441ad2---88007527592.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0747c13471---30341434820.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/juzamonulet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=tamilrockers+hollywood+movies+in+tamil+2009PDF 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_off000150e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000168f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168F3 16952 bytes
SHA-256: 281854f4ce786ae168803b27969eff9b9bfb749d96788892a8136b6b721efd29
font_02_sfnt_off00017fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FEA 19860 bytes
SHA-256: a673d739048990fb42829d22910f7869ee333803e09e39d4e1e2a43c9917cbce
font_03_sfnt_off0001b344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B344 11364 bytes
SHA-256: 98257e4bbfaee6af00ec9c7aabc5d97d8eb09970f51cf2d540fdb4523e616a26

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