Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad3f637e0e087ee…

MALICIOUS

PDF

75.3 KB Created: 2021-07-04 02:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8c01571b073812bc0e07b49847701581 SHA-1: 6dca13aa43f2ab1acfe4cf2874ed049d115fcae1 SHA-256: cad3f637e0e087eea58e492160cafe62a17dab650ed7588375b91996f226ac41
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a link farm designed to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to evade initial security scans. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a5c33c247c6933665a7a2d73e4c10e27/97195675532.pdf In PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/54985df8367bfaf28742cfae4a3d81c7/66157204185.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/14539264460.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/funapanufidi.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aea0d72d07---69595599758.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/13244157497.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/3288759980.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/panavufuneduxuwusumowapig.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/29703382663.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/587167f094d94d6c07bd40c8c70f3aa2/84151388506.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609414b1ee3e4---41419450785.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/26499539747.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8c3b1adc4---fafavakepiwomuni.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/ritaze.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/67184239599.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/7en6gadi3vpg1m62bhvkjhen25/36460272953.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608756d6d9223---wepidalom.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/2pi0d068n0kr5p267t09r44pja/2120113612.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b361ed73a12---bekixelelaninupumojinogub.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776a985fd5a---4252071246.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/c2ec589da74d8e9a6c280dcf09f8f2d4/42042769280.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1e5830ecf---rojuwex.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/17188973491.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=call+of+duty+2+pc+torrentPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC125 10716 bytes
SHA-256: 49a657f7217d4197066c3ceaca7ccf98441393e20b6b6863fdccfddc8858141d
font_01_sfnt_off0000da06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA06 18060 bytes
SHA-256: bb3a8ce3fa9e56caf686b76a0e9d7e31968a5ba08051a01101667c5367d9fe1b
font_02_sfnt_off00010844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10844 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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