Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46683ff94d6cf0e…

MALICIOUS

PDF

112.0 KB Created: 2021-07-31 01:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7010296294f140639e46b1963b66d250 SHA-1: 92d535702441e9ebcd820ed296518e0b2acfdb22 SHA-256: f46683ff94d6cf0ee4a689ff954d8981b8a59024ce42238f13b8ce78514fb3f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs indicates an attempt to direct users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://wastran.ru/uplcv?utm_term=what+equals+119 PDF link annotation
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c2581c602---41353106916.pdfIn PDF document text
    • https://fallsplat.se/file/mekemobugavo.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/kubusujigiluvunobum.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/2f9e268a0833587780ba05d99b7b2167/70641538356.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/qn30rbqju44sr4qijdl6e9pmi4/pekerolaterez.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/gh6ds700tl6sh0fvgvu6hml3cj/kezaleberutubeseri.pdfIn PDF document text
    • http://santeh.md/img/files/26598480387.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/de9baad87e7b38a358ae74ffc7a44134/49027646139.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/81481596918.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c5e5cc5e---fafawezaworedisidumoge.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/78c2b45c0a4c0194b5675962f89b14f1/75881283740.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3ac6aa644---fagut.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/muruwozafibinetemul.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ae74c36f2d3754f00d04a2241a5ca73b/wukodiv.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/bimijavenagazuda.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/97781333898.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/30663530767.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/satoxag.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/c3e4297ea115911d070c3443de469bcd/tagigesataritun.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/lagalazetebisalezojijo.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9aba682d0b---fezikejobibamogal.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/63102874304.pdfIn PDF document text
    • 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_off0000f55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 34544 bytes
SHA-256: 8ae3355f35aae83973682b355590a825c5940f3f62b8f0eeff1ff56bde3b0758
font_01_sfnt_off00015258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15258 17544 bytes
SHA-256: bc881ad6159d128dc8d70da9764037b844029a1f52b490278b4f58075cd4b026
font_02_sfnt_off00018095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000198ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198AC 10248 bytes
SHA-256: 18ba8e40907556e51a6a70b2a1d67ba0b57dea9cc44a63e08d4601c1e9d7d98c

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