Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3641fbf633ca72e…

MALICIOUS

PDF

68.5 KB Created: 2021-10-02 22:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6dd51d59aa79a3f8b3ce86ef588ec051 SHA-1: a3a1dac7b8ff65a1a5104ae3a192a93b770211f4 SHA-256: e3641fbf633ca72ef0412e43facf4cb7eef39c0644fe66bce77d6eaaa5c584fc
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, including one pointing to a raw IP address and others hosted on compromised WordPress sites and disposable domains. These elements suggest the PDF is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crysiq.ru/uplcv?utm_term=english+lesson+plan+for+primary+school+pdf PDF link annotation
    • http://theclubburger.com/uploads/files/62624840875.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/pisorugagodar.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/96391671189.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613671f910d0b---93556110483.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/miraw.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/wulot.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/83978751616.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/18765037849.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210914_6DD753DCCAC54DE3.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/gijalunupela.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/50935359713.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210916124423_z73g9p.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/71536801471.pdfIn PDF document text
    • http://cartopack.be/Images/file/87188741217.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac32d87079---63561835217.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/rokowuf.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161542cc16fe74---jujajuvukosofobebe.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce1ad2ca07---vefuzozapitifoj.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/66525204321.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/pesazoxixixilawefera.pdfIn PDF document text
    • https://adamslakeband.org/userfiles/file/82016339860.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/44629379709.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/76347126812.pdfPDF 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_off0000aeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CF 11064 bytes
SHA-256: 2f9421186ae472c78954f0802eed5f35672f3bfff8863c21effc2b64b7ebd1b6
font_02_sfnt_off0000e027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE027 14476 bytes
SHA-256: 6b252636d991b63fdce0de31cbdc32085335e7702f287d80df0e70675caf7111

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