Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e2cb5eec0d9b88…

MALICIOUS

PDF

81.9 KB Created: 2021-09-07 09:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: db657ef1795fb721593d31498ad8196d SHA-1: 7f0844cc898b6b810975ab98f74cc4c8f3fa7c42 SHA-256: a2e2cb5eec0d9b884c56d04c7a2fbe52c50cfc5a3e3c08d6c9b34515cc59530e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://retrolondontees.com/userfiles/file/totirajatuxisetat.pdf In PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609960bde02ad---4051195547.pdfIn PDF document text
    • https://ubranni.com/uploader/files/wapizafenotanawe.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/bidudifaniwuwumorubupu.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/26477b1234998a4351161a46092c54c9/nusekewemofozelivapo.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/gunuperetivuloredujuko.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/21252672992.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/0493ae0e29b18990ada89f95f4e7b87c/luxowozakapife.pdfIn PDF document text
    • http://unsersohn.ch/images/file/fevumadotojame.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/jopaj.pdfIn PDF document text
    • http://dogable.de/userfiles/file/24475200766.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/1ee90177b8a4b3cd979864413221a419/69283189654.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/rvp9i3lpvl3vkrh2ejg8gopfr1/mazaze.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/c1155bfc8afa382ef3cf76da4a4ce102/2932790261.pdfIn PDF document text
    • https://aaaxxion.info/images/file/81975066140.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607359108b1f7---2389583630.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/62780082922.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/80a6028502560ef387c8f033ccb69c2e/ramolubapuvuzilusu.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fad5bb9ca05---fuwituvu.pdfIn PDF document text
    • https://sanidom.pl/img/file/nigufebora.pdfIn PDF document text
    • http://andrewclaymonfishing.com/clients/a/a7/a7b0d980ee28df7184f998a87a00dbd5/File/wuwazekofadusof.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/5104825864.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/womisogupugazomedamipiduj.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/runol.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/gojurodakomawelosi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=anglo+irish+agreement+pdfPDF 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_off0000da1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 18088 bytes
SHA-256: ff81b458fa6e377884e55a15f0b37b91181a3ceb156ab33c4b3e08f2363613d4
font_02_sfnt_off00012183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12183 10928 bytes
SHA-256: 95957cb5c1ce6ec3dd06cc9217b03643cda466ea15630db343d211de72ef2c53