Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ece1a9652e38915…

MALICIOUS

PDF

89.6 KB Created: 2021-09-07 23:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b7c3a7ec544571a846ebf305bebe04c4 SHA-1: 542416f7caae5f0a1b6b47007270bd2f4a856291 SHA-256: 9ece1a9652e3891519d28474a72a5d3a5b64432fd97c77138e9ec1ba8a2e71ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. While no scripts were explicitly extracted, the nature of the links and the detection names imply a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd3bb2ae7---xuzodanakoseg.pdf In PDF document text
    • https://service-panev.com/userfiles/61670803676.pdfIn PDF document text
    • http://sportgalaktik.sk/userfiles/file/31142359369.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/5e2181935019bbe9796d993229b9591b/92118615421.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/5c74b8058025eaa586b0cf3c604d3c2d/wawuxeke.pdfIn PDF document text
    • https://shiokerbau1.com/contents//files/94306103803.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/topojadiwepidumop.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160751acd9f7ea---59731404014.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/aetiuih3aukl9d81ngegamgl4f/kixaber.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/e08c29ae17537126efd36dde72e4a004/kobid.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd2ddca803---dipepopewexer.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6b3e45122---84324719366.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210812060507.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/10222324276.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/743444cc467acacdb128109ae7a89ab5/22218409933.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/1763993933.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/pokaxijerisus.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/bc54a005e0a575e92ec466186a08a052/fotutilemufawaxav.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/faposawomegujika.pdfIn PDF document text
    • http://whippets-au.com/clients/7/7f/7f5032e15db821a993a8146895416847/File/kixaluvixiponenazaxedo.pdfIn PDF document text
    • http://gumberryoleschool.com/clients/33891/File/fuvejugu.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/2102117333.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607153a742b56---23519320814.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1131f2dd6---xorizesunemafarogonevozad.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611db9e824863---38748564235.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160970da08bba6---48622663817.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=mentes+sombrias+livro+2+pdfPDF 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_off0000f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5F 10976 bytes
SHA-256: 7a5cbdb7c16f5a7e833937a0c7df9bced1b1958da260ff9af5b48e38926fb83c
font_02_sfnt_off000124af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AF 20888 bytes
SHA-256: 79e2c21bb5ca821aa36330caf09e6ad2b9b814a86cdde0e328d7d5b2507c7b13

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