Malicious PDF — malware analysis report

Static analysis result for SHA-256 d318426ad20c2e8c…

MALICIOUS

PDF

75.9 KB Created: 2021-09-06 09:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fde0e310fa37cbbacbb30b48ebd290ad SHA-1: 44b3b2b8b5a5fa4cdc273c1c93fd624412bf2a48 SHA-256: d318426ad20c2e8ca3335c0708a5e433cc48264de4dcd9976f614faf2081f589
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160dc126fe8e21---52523057360.pdf In PDF document text
    • http://www.jindatunnel.com/up_files/file/92441751371.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/3761901662.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e6e1f23c1c5---74731714663.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e6f05579caf36ec1344bad193bcad2d8/64442487732.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/190f684bcd42e5dff59928cdd164cef4/terufukoluxabapekevobi.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d157abae55---rapebaniketuvo.pdfIn PDF document text
    • https://matratva.in/userfiles/file/foligasunuxuzarivopag.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084a20f41a06---75172200590.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/wakikimasejurakutin.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/donukis.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/47119624865.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/zisevejeti.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/fenenos.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759a15c2351---bizejolifogakonomofujul.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/97199860316.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/ec25724a7cb1ba7595f0588f9ef5dd20/jagekelosupovamoxuk.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/56350882302.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/xibawegegudoweranomiwow.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609846a78df22---pedoruwexojobim.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/8143785e3f83b345e121b6bb84610b3a/85825193773.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210801134315.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=drayton+wiser+thermostat+kit+1+manualPDF 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_off0000c47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC47F 17492 bytes
SHA-256: be3c1452d1b6034e3b37bd1032e33cbe03491aecbafaefde4d96707934ed3201
font_01_sfnt_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 10816 bytes
SHA-256: 2cd5c47c9fb159e9b27a143b0dfda61c73544901287741b1d2ab5dea1c54646c
font_02_sfnt_off00010a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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