Malicious PDF — malware analysis report

Static analysis result for SHA-256 845925709501f63d…

MALICIOUS

PDF

84.6 KB Created: 2021-06-25 02:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cfb94fd47131f15c3beef3900d4b40e7 SHA-1: 36f6cb26a4c00de24104b1bbdf21bed1f9e5c002 SHA-256: 845925709501f63dd164b275309aa242e23123ad147eaa5a3be530c4d0519a02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/1uss914acj6hl3uiaof0at5gn7/84258689580.pdf In PDF document text
    • http://0-50.ru/userfiles/file/mukirefu.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608808115e586---81110422571.pdfIn PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/solodejusigidujokuxekawi.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c98773b3f---56326261171.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/wiluronalejokavajo.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/9e13794b84940a995e9f22b569429e8a/74132069335.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd5b38b42b---87910590326.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/xewurotukamasumarovexaro.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/19317344097.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078e73227676---livipuro.pdfIn PDF document text
    • http://maxbrio.kr/files/files/lixituxibotokaduxakopovi.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a30c121546920fd05c80a0b850ae4f66/volofamajixinojilalebafol.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/cb42e830b22cd5d77d7cfa72fc4712bf/66729579855.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/6671330961.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751833cad70---40789348129.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/tizavonenil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=moto+e+manual+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://scripts.sil.org/OFLIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC718 3724 bytes
SHA-256: b64350c7bbdab9a8dc064f21a0594747627629593141b2bb6cd02da97e11ebda
font_01_sfnt_off0000d456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD456 4752 bytes
SHA-256: 3baba287b4c2eed80d227f01dc1d9576de44b65037267307a1078e77baf94ee6
font_02_sfnt_off0000e470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 13744 bytes
SHA-256: d49089c215a57598b08a6120aae1a7e12627af9919a2c5e93ed193ee6c489589
font_03_sfnt_off00010fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBA 16988 bytes
SHA-256: 671cfc3984aa02236fdbaf1609f0ca9d5090b6e3e1dd8264429b7bee2cd92591
font_04_sfnt_off00012805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12805 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
font_05_sfnt_off00013605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13605 3276 bytes
SHA-256: 36e71c95d3b6602ce175a98ac99a2c18c99235fab0e24c6c46ec4ff9e72f8c94

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