Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bf847bea03d826…

MALICIOUS

PDF

80.8 KB Created: 2021-07-30 13:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5a764e946f8e6d5160b2051ef794b763 SHA-1: b7b6411952396d904336bc9e692b5b1d746801e0 SHA-256: 03bf847bea03d826b89bfce0e1c8c3197e6696d1f277dddc2d7b8149f5800c9b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to lure users into phishing scams or malware downloads. The document body is unreadable, but the presence of many external links and the 'link farm' heuristic strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/e50c0da9b3af577259075a1aa6b8f4f7/72464128104.pdf In PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/3582486540.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed6375470e---33514264049.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/2ae451f934a90e1a60b049dc3aa58d2b/55084593824.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/41825327543.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/31786879508.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e0c940c2a---fupijarozuribosumasenozur.pdfIn PDF document text
    • http://sieuthikhoacaocap.vn/upload/files/45661179415.pdfIn PDF document text
    • http://timebymtm.com/upload/files/xesarovewut.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ab4de6a85---detizabomiwiz.pdfIn PDF document text
    • https://5uempat.com/contents//files/wibavubiwalek.pdfIn PDF document text
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/34102687622.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/jajugamexagajorun.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094d4de03f33---dipuwejukunuroxixi.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/qst1o2ekf63pp1e2b8vjtbtfig/nedufikuluguninurakexa.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/79113396242.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b560c761c64---17646674961.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/xakonogagud.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents//files/jodosikiwa.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/80dae570a31a6f11ca3278e057d7bcdc/rikozelubakilew.pdfIn PDF document text
    • http://centrumbiznesurawicz.pl/userfiles/file/99617412025.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1616baec5f---42434593482.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef1bb2034---12956718867.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+use+capacitive+proximity+sensorPDF 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_off0000d672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD672 10948 bytes
SHA-256: 18f8c9ef2a95650bfbf77ab56b7366589ddfb8169c66d4bbda671ea58348d828
font_01_sfnt_off0000eff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10803 16476 bytes
SHA-256: 2f9f1ed2b703149904ceb527f36eeaee007af3fc0034bc066abf05127715a79b

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