Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0afed5ae4782bce…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 02:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ec0778f1f728ee638fc0ca31a3b5ab4d SHA-1: d1294a7a2c773a8efcb6de110bf97c5ca8aa11d1 SHA-256: d0afed5ae4782bce93583c7662ca1737649048e3ec7a45534b743043370ed599
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a malicious link farm designed to redirect users to malicious content.

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://oniceh.ru/uplcv?utm_term=xps+to+pdf+converter+download PDF link annotation
    • http://kraski-chernila.ru/resources/file/31558579942.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-7-28/20210728111649985996.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/10894184263.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4d89cecad---pideremo.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72b2ad7de9---72618633590.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/kuvodowimuvaxixugojala.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/42d00e9bde94942bb29ccb24bc0b2636/93659740288.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///geduzage.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/tqlfnmknlgci0vqcfa58md12er/586574894.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/83857574865.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/kegutuvififekuredotawe.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/pogovavapegima.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/ea8e85e17dae15eb6cd77baa8f80cbba/3235558945.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/pafonaxaxesuratezimosali.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/27732661321.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/8943604920.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/gakesejim.pdfIn PDF document text
    • http://dyccpharma.com/upload/files/kefaba.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/3e9c73a2bff5f2b2bf4b70f3181b9e78/tubesiwozudegej.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/37503040372.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/81986547255.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0f648406aa---zakubavur.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/biwukikoreka.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/74687857635.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_off0000dbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF7 10680 bytes
SHA-256: 9af49708b786d621d446f4f554711376accb7481e8ccceb49240768ddd56dfdc
font_01_sfnt_off0000f4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 18180 bytes
SHA-256: da5d25d6740a982e3b718da289a0896dabb1754530267550d1a6d9ab8626634e