Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0db21ef3f3f5b2…

MALICIOUS

PDF

74.8 KB Created: 2021-09-03 22:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 5a2938d1f1476c8bf3f570596ee1d36e SHA-1: c03cd2bd510225fe36bb17b92334c9337a7cd692 SHA-256: 3f0db21ef3f3f5b2c3f0507748b9ed090f82617198331294fb6065290c4c6a12
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The file contains a large number of URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The primary function of this PDF is to act as a link farm, likely to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://crewmak.ru/uplcv?utm_term=mfh-5-1%2F4+festo+solenoid+valve+pdf PDF link annotation
    • https://dancleland.com/img/upload/file/93757103863.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/weveretudegufudipudigax.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/18104152484.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075e8457183c---94265252089.pdfIn PDF document text
    • http://hpcad.pl/Upload/file/73410835186.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/3873dd73f4c86ab59839154a0264379d/kopegat.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/sl5guu54ov79dkuqtujdvmnhf5/sopesigeju.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f81d2d6b370e0c8aa7c2b5e1821debc5/wadizinemufisidewe.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/4d613d1202d198915e015b7c0964297d/51465889114.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f4f9202f0f1---6070945426.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/bemusagoguwawulowejukexo.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/88489206448.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/26418644805.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/zugakowas.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16078b730cfc95---230492273.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6f9678e1e---gakin.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/pokux.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/sulutoduru.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610af34c75e2c---towefubosuvonumuragadat.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/rubopedesixarajura.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08657bae88---28530699893.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_off0000be86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE86 10884 bytes
SHA-256: 409d7b02f0b9586cbc98d17ba52b1b16ed37a87f2dcfd488a4f3fb15e4afca74
font_01_sfnt_off0000d7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 17684 bytes
SHA-256: 63b5b68491b18405e3d0d1c636f3065b409ebb08e0f0ddb0e97a1010bf76913f

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