Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c1d7fb34a82b98…

MALICIOUS

PDF

91.1 KB Created: 2021-07-04 12:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 63e3d750a2bb9b53ac7307fcb335a03a SHA-1: 97c8bd70a6f654da018fd36040ad747f0546aea7 SHA-256: e6c1d7fb34a82b9810cdbf854143579bfa75201f0e9f9a1927d75aa86525bc79
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://studiorampinelli.com/file/53037893822.pdf In PDF document text
    • http://kadh.kr/bobod/upload/file/30843008630.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1bf551ff9---36945356909.pdfIn PDF document text
    • http://mega.kz/media/upload/files/34404994639.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/19599759724.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/a5e6b7f89c9025ac15f8d2406ed0b4a6/97469222515.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/wesugorelalinitabutepaput.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/76760466016.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b843eb24097---8691595948.pdfIn PDF document text
    • http://naucseto.cz/storage/15160151642.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b67c7b4ee3a---41014325315.pdfIn PDF document text
    • http://ipublicity.cz/data/file/tarifegumiwulejufuguzotix.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4b120ab35---36473648774.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c69b86385dc---pesalolupapuridop.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af23b508b99---43448695815.pdfIn PDF document text
    • http://charivne.info/images/file/basowineruvinewa.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/uu7q1ik6ov7l7gjde9q6fkaprg0ogbm1/penekavulopuboxa.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/44f17ef625a8ce2aed80050e48c1400f/fasilabal.pdfIn PDF document text
    • http://webursitet.org/Files/file/fikitawerapusisozuxeka.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a3040eb8629---87264431204.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/57976093636.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/k637ku89c07ntf841e6kga00aq/xejus.pdfIn PDF document text
    • http://s-moonlight.com/CKEdit/upload/files/72708466107.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f146a5504---jepigitifazutojuzonaxidex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=professions+with+gPDF 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_off0000fef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11709 10372 bytes
SHA-256: 30675e852529e7d0bffb80db43e645f5c3b23aa4d289e37e7c9a2f928e85fcc7
font_02_sfnt_off00012e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E81 19236 bytes
SHA-256: c051bd6853c5f51eef2df980774f2661ede634d510ce4fbca994ebcf2cd51d53

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