Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd7cd07511a1e19…

MALICIOUS

PDF

89.6 KB Created: 2021-07-14 08:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c6fb5444803b28ea70de22082aa61df8 SHA-1: eb9b58cce9140227d64592fdc77e4274fd8364f6 SHA-256: 0dd7cd07511a1e19d349204f7b59f8ca20fe18a1d99497d56db3071a23086548
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Several heuristics indicate the presence of link farms and compromised upload storage, suggesting an attempt to obscure the true destination. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02ff3c1ab1---78084034927.pdf
    • http://tscyw.net/userfiles/file/20210713045813_ra9ams.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210512010135.pdf
    • http://fszhenjia.com/upfolder/e/files/20210714075701.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/4c86be6ee05651e6607cd9eef7570410/2845470610.pdf
    • https://wegofa.com/userfiles/file/19125240963.pdf
    • http://agendaalzheimer.org/files/galeria/files/83394609678.pdf
    • https://isosklo.cz./uploads/21332617752.pdf
    • https://sonntag-immobilien.lu/userfiles/files/72669105823.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/bebowitekikugotinodilire.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df703dabdd---temunomuwibugiritufugaz.pdf
    • https://gangnampools.com/contents//files/87943111982.pdf
    • http://vickerycarpet.com/uploads/images//files/gifojajikutixapata.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7da15fffb---zusunikogogexutin.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/cee9d1c22ab56cabcb09dae68fa9c098/60383837362.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b90184ea76---ritalabisemajep.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607286b8976dc---semotumajofezexumiwisona.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/ae0f265954efbb50155afc0769a48497/lisezibewujevomobesaguz.pdf
    • http://kcntanduc.vn/img_duhoc/files/gavopi.pdf
    • http://ozkayalartrans.com/userfiles/file/gososuluwemomopemamanune.pdf
    • http://kursadowicz.pl/Upload/file/55631377498.pdf
    • http://peach2560.xyz/js/ckfinder/userfiles/files/92256620111.pdf
    • http://bukharaatlanta.com/sites/default/files/file/fudizugebesasete.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/9a79e79c32783fc6cc687a5c7476bb7a/70723364415.pdf
    • http://cdwy028.com/uploadfile/file/20210618195501.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=classifying+rational+numbers+worksheet+6th+grade+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ed.bin
57bd2e4940479a5d4ae2f8c1706dafb556211e72277d192dc6d97aa582c73688
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6ED 11676 bytes
font_01_sfnt_off0001123b.bin
ac3dbde46bdbb63e6105a20f7ffaf0e357b3bc1445a5bdcf7cac229891d9bfb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1123B 17704 bytes
font_02_sfnt_off000140ac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x140AC 16792 bytes