Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02f084dd5dacf19…

MALICIOUS

PDF

89.7 KB Created: 2021-10-09 18:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1d62e695a0afc358558001ba4dc8e736 SHA-1: c3cdf328f1140aa2d71d7025ae5fdf909d345d6e SHA-256: c02f084dd5dacf19192c4e7eb7eb1714631ed12b95e1b6455e500e483d766248
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=crown+of+thorns+bible+verse PDF link annotation
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153cc64ea182---52732265820.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/84603904970.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/titebejarasab.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/voderewovoselof.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/5616518506.pdfIn PDF document text
    • https://designclarf.it/file/84594184125.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16151cad823575---golafeporapuj.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/mamuliz.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/15512611079.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/sakoxunuj.pdfIn PDF document text
    • https://andreivieru.com/ckfinder/userfiles/files/bavopivofiramosubotixuvop.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/19638272302.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/marifijevifudekazijivebi.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/vuxokigalidenaf.pdfIn PDF document text
    • http://saint-party.com/media/file/72034262494.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/xigatasoganofosituse.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/96751640054.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/82438734415.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/pelodogoramalo.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16158fb3680bcb---62959168051.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/94907759523.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/sutowurarinebuditiwuka.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/75328372266.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FF 18888 bytes
SHA-256: 5e8e5c39a17ba8b95c7ee3bf68279f9138f6d65ce710ff6bc3c92b48ef89f8c6
font_01_sfnt_off00012907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12907 10472 bytes
SHA-256: a822522d8710ab9e560dab43c0840b9e64d0e4cec1ee5aa97a11d80f99bc09bd
font_02_sfnt_off000140cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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