Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6fd42f92d463557…

MALICIOUS

PDF

97.3 KB Created: 2021-09-04 17:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9f658b2847fb14bb0d21f2ecc77f9c1f SHA-1: 55cbc8cc2b2e802c71f8d3ab43281ddaf3eae152 SHA-256: f6fd42f92d46355726e2d3c184e61b1c0f3cf778823e671fec0e4976c95b5219
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of these links indicates the file is likely intended to redirect users to malicious sites, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://garglob.ru/uplcv?utm_term=material+requirement+planning+case+study+pdf PDF link annotation
    • http://allaboutdowney.com/userimages/60492330238.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/71628611096.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160778f747d1f3---joboberuxegebuperokunowo.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/67f82520e1edfb6e6e9b059daab3c2af/tifiluvovigejososemazade.pdfIn PDF document text
    • http://trhs1966.com/clients/b/bb/bbabdd843433c1cf4d3e80624837507c/File/lanodavelowex.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210726_746F8EDA88B97B6F.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862b55f3977---55266671799.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16208295248396.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161237025f032a---ponogoxep.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/98427432254.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/sivurolona.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/1b9a81ff37868d9653e0f2b6862e4b2e/64657992520.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608070e971088---95569724425.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/waziwuzuvomidazisetudosi.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/wekidizolametujanegetobog.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/ba44a2792ffe8b594522cd6920ae63b2/55449801698.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/89627658712.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/56770add6e139766b86d9ddf75ccb5d8/49592011996.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0390b4ea2b---76476856425.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/rf4383cdarcit2japb2g2f9k3v/koxutivuzerogotudu.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/xixowusegatuton.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/2116186488.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/vn978actmdqvvu2s2oar9vnku0/jawosawoxuvuduzen.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b667c9170d7---vazimifisoniriluzi.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_off0001135b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135B 19120 bytes
SHA-256: 7fba165311e51700bf4f954a5cd0faa92153d45de450772ee71b53cc7cb8471c
font_01_sfnt_off00014529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14529 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D40 11196 bytes
SHA-256: 073a47ea2c54768bb0c8b170c8f95bf397fbeb56b7ac12b62fb78649826337df

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