Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdfb0ca5775d0d4a…

MALICIOUS

PDF

69.3 KB Created: 2021-08-04 06:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 01c3930d95c5c67debccea9480512db2 SHA-1: cf5ef88691ce90b506b14f8869899bec9ea83282 SHA-256: cdfb0ca5775d0d4ae1de3c8c790cfaa5371f0448c1c4a00b2e6016f8b710b0f1
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7318

Heuristics 5

  • 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
  • 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://palaciodelosnavas.com/userfiles/file/29216343315.pdf In PDF document text
    • http://luxe-pools.fr/i/File/bosadudedodugibikabene.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/12143496386.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7034e9bfcb---tazibitoridukafuluwopo.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bf47202a859---30919287696.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/m100dh3q37v7ebj9s1fd5ljcle/gasalukitugabuwojiwix.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/3c20643bef036487173a3ff6d633af66/juxanabonevatorisupevoger.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210624_DF2A2E4B0D9F5C9A.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/54546642947.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/14921889340.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/7240451b4b587f241aaa4a957a75086b/32062855342.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/916c5e22296e0871c499f4dded97a837/14683246501.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/borotafaxaduzos.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles//file/jelasevedilomubutava.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/45854247755.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/k9113rrctjluqrc78ka1veb8ar/49727435935.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/88719540806.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afa1b984f26---85916465364.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/lidaviwazerulagig.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608510e2794ce---tifodukisebosajovu.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608be7929be41---43602992297.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609022342a696---kitiwoxugenokofilig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=tongu%C3%A7+8.+s%C4%B1n%C4%B1f+matematik+taktikli+soru+bankas%C4%B1+cevaplar%C4%B1PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC501 11700 bytes
SHA-256: 46f2ea953042ae10d0235fe8e980957463af0fab3e0431f4c2e563d6a9600704
font_01_sfnt_off0000e06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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