Malicious PDF — malware analysis report

Static analysis result for SHA-256 020ba2110d428d79…

MALICIOUS

PDF

112.4 KB Created: 2021-06-27 03:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 97c0e8adac3d32a212c6bea38c72f6bf SHA-1: 712d2cdd471980c0d9967962e4981e6847a6e47a SHA-256: 020ba2110d428d7973f341368920fedf2d893ec6fd6ea88e3ce11b61ff63f6d7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a242d432030---44321561610.pdf In PDF document text
    • https://rendiamovisibiliglinvisibili.org/file/golakakulebujoxubagavija.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/9cd37fddb14511a93fdb2f9e350b833d/63215363984.pdfIn PDF document text
    • https://termoformat.md/img/files/26725840019.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a15ac3cfb---46910979822.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/lv7mekqm93m867imm3kvsscg7d/lasuwe.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d19749654af5a61bc43c01a2706ba521/77305269644.pdfIn PDF document text
    • http://didocrosby.com/imagenes/file/82746577836.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/94479616377.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719ad1c7db8---zinasanebumamibegezo.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/17ce9b5960e894d8032da33c963f51ac/64774076245.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/5204563735.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/6m9kfr1nubdm3erqna0l71jrkg/50913338808.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1dd442f7b---84679869962.pdfIn PDF document text
    • https://daks-96.com/f/uploads/files/sofekaturominek.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/gekedekunebegegala.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/75109821718.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/ecfe259cfd77b80a0dbaa9a8c1bbe77b/fuxasiburajojud.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/63846117480.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e100350c9---pimes.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/10398820357.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/kematebavogidoxidoti.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/1cd35892598b69b4c47303e7c56b02f7/pevazekifuvesagopibe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=aesthetic+needs+definitionPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A4F 10244 bytes
SHA-256: 0f7c68b41de30586db8c3e7d64b3908787dd54fc4a7f7b8b3ae83dcbfdbf176e
font_01_sfnt_off00017150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17150 16620 bytes
SHA-256: 10e163d39a84d79811bc8d78893a821c4b7b5cb4db9be2383f0726ab95b3695c
font_02_sfnt_off00019c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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