Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec5a7412f0e0422…

MALICIOUS

PDF

88.0 KB Created: 2021-07-04 12:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 043ca6d8aa1d4c7e695167f647d2633b SHA-1: ec6f05b1a5de9293cdc2dbed13bb37c4cf52663c SHA-256: 2ec5a7412f0e0422d884c2323da0850cf06d1219091260a597e67418d5b4d373
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to external, potentially malicious or phishing, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://crysiq.ru/uplcv?utm_term=chinese+fried+chicken+gizzards PDF link annotation
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd7847c1c2---jimurofoludixamafot.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609041277b398---kenojixaz.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a807d26d265---wigipaxujowoba.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/monetusosukaxozomapelura.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/c9dd4f90ddcdfd3e006aec56c18f203d/dobokerovifoliletemisamig.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/pilonagimowipabexidim.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/28697247965.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/bacebf8048111d1078aba98e8cb4f238/15278524104.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a036082116c---52825255488.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/35227fb7bdb05fb72eec85e86063adc6/titokeguxifaruzak.pdfIn PDF document text
    • http://ideas4mypool.com/userfiles/file/gajosu.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/12cff98e7e60861b9d840eb108dcd208/59330619204.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe2093cb0e---sanikereganewenikijaw.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af87a89bb8a---25242496937.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/6644692040.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4356c961c---xowekixobimujidikobidaw.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a527a0ae12---89841481713.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/d3cdac3a3ae775bbdd4823c13f0ed7e9/dijalasilu.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/mfsgfvi474mrf9mmnhrlk0131i/joraf.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/79587875360a66c58dd2e2.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d2892e457---70797778233.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160925590d424c---savivonunotene.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a57806aa91a---dokotalava.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_off0000f3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C1 10676 bytes
SHA-256: bd80fb9d2aa1efa944da90a1d3c99f1af4aeeeefdf1ee4ff4c47ec46510ce070
font_01_sfnt_off00010c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12414 17848 bytes
SHA-256: 6bd4778522d5e5054417a9d97d53fbd7b5ab15d760af0fd3d492fcbd2dd5ef5b

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