Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ae01de773fc4e2…

MALICIOUS

PDF

69.5 KB Created: 2021-09-24 15:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d7a97ddf3ff818d679b1cf6617a4786a SHA-1: 048b39ef98cb65bc2b5053ef4558b84d53e481c7 SHA-256: d2ae01de773fc4e2f60b536cdc5b9e67d104f2ad5d23a9228ea3c3ff8bc0d1ec
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. The document contains numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://ketchas.ru/uplcv?utm_term=coin+master+cheat+engine+android PDF link annotation
    • http://probeg2000.ru/files/userfiles/files/dulotomifisutuxodosom.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/kixusuzipigixa.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/berejikuvoxuvesizaze.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/40699418965.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/44189112420.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421a4d91a51---turawatiju.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/momebatisobowo.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/45002222275.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/47851690720.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/49272113315.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/bifoxemof.pdfIn PDF document text
    • https://sandipkumardutta.com/ckfinder/userfiles/files/jegajigumebulasufes.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/161425d4683529---zasukazexibidaj.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/24187271614.pdfIn PDF document text
    • http://unitekinfostructures.com/userfiles/file/52645679001.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/64404008828.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/7754767057.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc0d5766e3---74927277163.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/55098615793.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/xelupeki.pdfIn PDF document text
    • https://longhoang.vn/upload/files/83768958731.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/31516012909.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/rumetarewitefimi.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/gifebe.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/37621654098.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/xofobubawavuxasapo.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_off0000b3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E9 10804 bytes
SHA-256: cd723e0f7f06881fb66d2e59a5ceb6c6e4745d4e3d64cccabe8e02309a2f81c5
font_01_sfnt_off0000cc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE482 14240 bytes
SHA-256: e33e92649c9aa58861d677bb83b277b1f0e59e15f5e3b8e56d92a60cd436a010

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