Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a59cb7d3cc70126…

MALICIOUS

PDF

86.7 KB Created: 2021-09-01 16:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 72becdc8181495d756f87357f7dca51c SHA-1: c34178ce67917610119537945b79f55c7d59db04 SHA-256: 7a59cb7d3cc70126b90dcdb05c5f9be4c8bd9ef3c6f23d17158b298bd88c7d40
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=oscar+oasis+full+movie+in+tamil+download PDF link annotation
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/823ff087bffd5a043bdd0928052049e0/lojurosovasodiguzafo.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff532eb7dab---77029157104.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/42791264166.pdfIn PDF document text
    • https://crbz.ru/userfiles/file/90960131539.pdfIn PDF document text
    • http://101balkon.ru/upload/files/63226771433.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202105210442584405.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160afceb1c894f---33219945643.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094add0b1977---wefafiviguranafa.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/nawudulavidirevagareze.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/nel54926mcndgn39b5jkk7rvj0/73399400742.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/42863260607.pdfIn PDF document text
    • https://geniodelweb.com/file/64262141701.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de22d9d2d3---gijiso.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/nolekenedawi.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/13566787962.pdfIn PDF document text
    • http://envigest.cz/upload/file/81599797073.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/32ceqtmnt1e3j2n0i5b8doujul/66575987314.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824cdf8e353---9141984118.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160c3087d62297---wanofepixawosemovovemo.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160824494256f4---87868190104.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms//images/file/zajulelabofow.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/17880038850.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609839e760d62---3703031307.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_off0000e243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE243 20600 bytes
SHA-256: 6c8ce0de156ca9fab4d7dc6f3d5b9823ce58bfbd9b00df2562e497e577f6f54a
font_01_sfnt_off0001191e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191E 10912 bytes
SHA-256: 270a294a3177183cfb66a4002c5961a345efe5fe68fa5159bfee5ab38e7ecd5d
font_02_sfnt_off0001327a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.