Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e42ef9a3b5f7ca…

MALICIOUS

PDF

105.5 KB Created: 2021-07-14 00:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 683d9e3daf96c8b93af48b84be745081 SHA-1: 45d59684cb1e08c471a59351ac0a7fcb9814df38 SHA-256: d5e42ef9a3b5f7cad285851543b4a3d30147652fbc37880b7618a43426e6f50f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised websites. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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://garglob.ru/uplcv?utm_term=hebrew+word+for+adultery PDF link annotation
    • http://studiotecnicoprato.eu/userfiles/files/45681934459.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/8o0dtj5phu3vkhl81e39so29u4/mapobug.pdfIn PDF document text
    • http://www.pvvc.cz/files/67666723626.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21e3490b93---56490172844.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e2f72ed8d---2216668505.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075959741f5b---37665451286.pdfIn PDF document text
    • http://antae.be/app/webroot/uploads/file/78281278005.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/42607751860edfff51a24a.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc46f1ebbe---83528001354.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/zapopife.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/pumolewamefamig.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16090411785982---95221876162.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/62936318021.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839f20bbd15---gepuwejajunigapijarom.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607e03c519bc7---banubuj.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/vt50dg1k295pnbtd9am4da9moc/99455559055.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093ae00e3597---47721422331.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbebc7081f---nefek.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/juwavosuretibiduj.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/49066076624.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/xuxebivatonexone.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/jukofinugotasofaveko.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/tesalewopomedupib.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/dadolexesisofupoje.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/b3b43429a6b4097e51cb6e443dcb5a93/4489396016.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E2 17700 bytes
SHA-256: 851341f26079bc10e42548acd0f43a646e06180c022b2c6d638cc83d6f481129
font_01_sfnt_off0001322f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322F 20964 bytes
SHA-256: d20296650c35bc0e6c0f8e70f5be1d6c8ce09ab4f55b5c8bf73ecf9d3d2d2316
font_02_sfnt_off000166ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166EA 10412 bytes
SHA-256: 322e32a933091c302510ef398bb1476ead5a3a279899bc2e5e4f8e6eb5cd5582
font_03_sfnt_off00017eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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