Malicious PDF — malware analysis report

Static analysis result for SHA-256 700eb1a24c3fdb81…

MALICIOUS

PDF

89.1 KB Created: 2021-09-20 19:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 64fa22026f11dc6a930616fd5f02afba SHA-1: 6a8148437d7d5c2ec1d5c4e7e6c059b4af123300 SHA-256: 700eb1a24c3fdb814e16560fd7a40a7cf3fc2547602f25243c1fd52725d53f8b
164 Risk Score

Malware Insights

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

This PDF sample was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer, likely to facilitate further malicious actions such as downloading additional payloads or redirecting to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=proximity+sensor+miui+12 PDF link annotation
    • https://jeevadhara.org/work/london/userfiles/file/59261373950.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/43slb9melh0o0oca64jq9j6pik/75383894642.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/wunix.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/vezapifut.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/lotezesoluvudibafe.pdfIn PDF document text
    • https://sapthagireesyathra.com/userfiles/file/51034857603.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/90172184022.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161408d9a87b54---xujonapivijotexigomatude.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/nabivagupujipovofuda.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/sumalotivik.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/72036294564.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/290ba4bb9e40ae1929e6e26105d8ada0/tedamekodeg.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/29461341119.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/bevegilonidilupurisogas.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/bedogexiperolaxakar.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/subiwopudisulanepad.pdfIn PDF document text
    • https://rsvforum.com/userfiles/file/zuponunilepojisegunoji.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/29905520030.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/20084756998.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/lowiwaruzikewexizo.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/neromebaramegijorogofirib.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/pipedubajawuzodizuminuges.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/55386288713.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137288e457ba---86499677735.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/fevawojujigek.pdfIn PDF document text
    • http://www.og2c.com/images/file/tuwifodavagu.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/2842ec60db0c365bc3cab4afd76a7785/83895795122.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_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B0 17068 bytes
SHA-256: 0f09b0612d9f614b8066dbfe49d456f300f8ee5b3deab8c221e2b2249563f359
font_02_sfnt_off00013e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E57 10552 bytes
SHA-256: b9fdabdbc3714c023c0255bccc5fd97d889e5524b0868adc13fdd7c0782386e8

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