Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29303419662364a…

MALICIOUS

PDF

128.2 KB Created: 2021-06-28 00:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4cacf7272af36aa2f6f7ad915fdab798 SHA-1: 0b088481e9052cbc1b0057b7cb2e2e532fa6e54c SHA-256: e29303419662364aa2c04a456f5bd2552e0f0f8e2eda0fa37fa2658ff2c7ab3a
156 Risk Score

Malware Insights

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

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 for phishing or malware distribution. No scripts were extracted, but the structure and URL targets are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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=disruptive+technology+examples+2021 PDF link annotation
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16073a061c0dde---pebibedakez.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/8dc719951ba631bc779f6641667619e6/fubobiwomeruv.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/7b8d3803a76e574d340d17f7f954c94b/mosatobu.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/b6fabee085cf1656fa4c424853aa9fad/rovamajagexixamopafu.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16081fa6936054---xiwawawekojixorak.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160987df290f4e---39957392452.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160accdb9f15d0---tovavafekivanodaweme.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/vefedomat.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/binari.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/723164c18a7cc16b5c2eb305c7a22344/10166562655.pdfIn PDF document text
    • http://allasclub.com/campannas/file/58918833514.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/zonatigus.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/76f7ece42bc4f4d4fd249b02043eb20d/xomopotetepojonizukafami.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d8f4c2357---kiribumigonesurelokev.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79ce9ccb70---54595995886.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095e6d7aef7c---nineg.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/42309092658.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/cdv054f7hf786drvmj5bb4jl4m/29139316286.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/169e03646a42800ba61779a293e99eb9/52188972298.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073c501a1693---saxol.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4801dc90ba---1441411859.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/lenewogaladoxufixunaj.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F2F 19056 bytes
SHA-256: 22fd4ba9ebd27216029832438cac2fda40bc29c1c2ccb814c90f7d55561e368a
font_01_sfnt_off0001c05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C05B 11500 bytes
SHA-256: aa10b118351a9dee9bd37ceb2efada2373952909ad234945506ca3d8e50850d9
font_02_sfnt_off0001db97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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