Malicious PDF — malware analysis report

Static analysis result for SHA-256 759cf39def48982d…

MALICIOUS

PDF

131.4 KB Created: 2021-07-14 06:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: ffe216837168ffffb6ead65da90a2028 SHA-1: d406d935bc1a7ac4f7fcbc7fae25267cb466cc94 SHA-256: 759cf39def48982da64584e23f1fd832d470be34e433dbd951474d91f82725fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9944

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://polloricowings.com/uploads/files/lobegopulaveri.pdf In PDF document text
    • https://aedwea.com/upload/foto/53037670251.pdfIn PDF document text
    • https://yodobashi-church.com/39927721350.pdfIn PDF document text
    • https://callalilyvn.com/upload/files/pumame.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/v23iqacj0tnqkuqniu5ndsf4dm/vajoxatisajex.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6496a861c---sogij.pdfIn PDF document text
    • http://aven.su/userfiles/file/niximazutusuvikawininajed.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/92983043983.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/51c1d20311dc70a58a0009b6411180d8/81677511533.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/77199842413.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/e279288b78856f9094c1433e3bfeb8fd/67782964869.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/bdd658fe4e87a635500428b426d2889a/57589957873.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/januwagazorofopojo.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/69111728598.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/7rhf6ps1hgqklocugfe39oo9kv/49332324669.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/63790039964.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160aa729c9d77e---88339976765.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/1b8afb56536bd4ecaf43fa52963c3656/75849875117.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a22cac4e094---jabefupolelogagirinigate.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/a58d93a3730324bab746f38323ee307c/jigudewos.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfe8caf436---30940392324.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/615dc059c7c55eb47e71de3bf99ec24e/36440207243.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/f89ca6655476d501d0f7f93b41500422/88506287539.pdfIn PDF document text
    • http://ahchala.com/img/file/fonojetenix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=penile+herpes+zoster+treatmentPDF 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_off0001a134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A134 17700 bytes
SHA-256: f040c53760fb856ca47449a4e1570cad526880f331a3ac89354865657524841f
font_01_sfnt_off0001cfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFD2 10580 bytes
SHA-256: 9f6551980cb850f50eb6b5b8acc7c7a0ac4e3730aa18af46b0f26d3752d62c87
font_02_sfnt_off0001e7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E7CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1