Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f06a01541849b8…

MALICIOUS

PDF

87.8 KB Created: 2021-07-13 23:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8578325e696a7d66cd867d569c7d409c SHA-1: 39b75198b1e7e44bbf51fc453d184749af8aa63e SHA-256: e0f06a01541849b8023f504a0eee072722f9f473dd1462177dc90d8c4306da36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these compromised hosts. No scripts were extracted, but the PDF structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=alex+from+ready+to+love+update+2019 PDF link annotation
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/3295d39b0741106a22473585e9b3aa6c/xeluzotomitev.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160789d8dca4a9---58813864118.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/94493205584.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/motobelofupupamamon.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b352e07005f---48171739271.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/dmds45o7k44aeoc1uh75qfmfh0/jawamamemokevotidawutow.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/11968287238.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/fosapadamudem.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc911847822---gezaxavused.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094a916d4f66---58920975981.pdfIn PDF document text
    • http://alcantara.cz/data/file/96976642148.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/52180644525.pdfIn PDF document text
    • http://waltwhitman1964grads.com/clients/6/6c/6c9ae932573016e5ff31759a10dce4b4/File/55935854318.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/pemunara.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/qsu4da65nb6sqat27naugi7n65/74695300360.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/21242111588.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/57007106919.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaebb989bc2---xaluwafune.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/59069590501.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/vinakupajuvipogovemawo.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b1ab11cea---vifuxezuzegokosupifariwa.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8145344256---vosomuzizevafot.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

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_off0000eeff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFF 11120 bytes
SHA-256: 92bc24a21c89d5eb8db670dcf9cde2a5f8bf465958f3bba8c35eed05ef9e643b
font_01_sfnt_off0001091a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091A 18056 bytes
SHA-256: 3ce355487eea7304e50fae06aa3c65e28e620267c2e0d52b18984502b1b9441e
font_02_sfnt_off0001386b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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