Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ad17918e50d749…

MALICIOUS

PDF

78.6 KB Created: 2021-09-03 23:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 47277dc74dd2419d408bf3051c285755 SHA-1: eb6cf7a12e4eda8f986ed4e63f33a5388fa111b7 SHA-256: 70ad17918e50d749f09a8d70974e968184bb29bc61933d09d963ad4320450bf9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcf9d9c0c12---28547030634.pdf In PDF document text
    • https://nusbetaja2.com/contents//files/rifepatuligigininobi.pdfIn PDF document text
    • http://mfcpavpos.ru/file/2113081398.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/litow.pdfIn PDF document text
    • http://splogservice.ru/content/file/gifunuroguliburunafuzosi.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/vogotur.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/994b676c99221bd47a2b3b9ea682ce41/96043251009.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/gegozopakimeg.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/r6orqn5fss279iqk9cv884ik5b/nenotikogagenu.pdfIn PDF document text
    • http://citywideok.com/clients/75789/File/70783999141.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f52d6d831---39450249642.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4b00b0635---25675906867.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/78128702215.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090cc925bd55---58064624961.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/rexelujamamisupixitefeno.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/e4f1ba82f1747ddf3a7a3767d17ffc9b/21570226908.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/8598115124.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/68892667610.pdfIn PDF document text
    • http://quinta.cl/upload/files/bigizuxoja.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/53521988876.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/42433783113.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f73cdb221a---23127199841.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=comprimere+file+pdf+gratis+onlinePDF 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_off0000ce8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8C 17252 bytes
SHA-256: 6d79250cb2db882cd9ccc9bffbf0b41ac127f6f837ce7b7a3a9b3acc90cd76ea
font_01_sfnt_off0000fb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A8 10872 bytes
SHA-256: 3762a9393ba47662ddef71549dbd06ee27102b6b6af4581898d23d427f7173ad

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