Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea593fd5508eadfb…

MALICIOUS

PDF

77.7 KB Created: 2021-09-18 11:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f69eb32d32dbec259217aa25fcb4c09a SHA-1: f475e647d1c73b2b468dd7c79ca34673901c7d21 SHA-256: ea593fd5508eadfbe0796f98a658952ab25940f5afa7aa5c14d8ac6961717f9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://nomylo.ru/uplcv?utm_term=black+swan+full+movie+putlocker PDF link annotation
    • http://skisun.it/userfiles/files/kijakenogolitavukogawawiw.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/58621703966.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364b54522e1---viduwutuxepifepelep.pdfIn PDF document text
    • https://cliniquemyo.com/userfiles/file/xopiwuj.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/3465845275.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210901_5B0BB4A60C741B60.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/79485789427.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/70592385910.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/ribobatagijufat.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/66572614507.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161436a33c290b---ziravipesepizumufa.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/31773202783.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/79257824587.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/fedomo.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/jimapasirobijadiba.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/75586177440.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/60616741460.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/70539635424.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6bd051773---gixewinik.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/remuwepumexatipexugo.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/xufedezadutidojoxiw.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/fawasixeraganumo.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/rizisexutoxaka.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_off0000c670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC670 18992 bytes
SHA-256: f5baeb4c1824918c5b177830d7b1e5f9117f40c124c615f26bb96336f5506cd8
font_01_sfnt_off0000f79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79F 11040 bytes
SHA-256: 74221a97949b762817dabe12181e5d76fca3c6f4c6b325c378dbcae55da920c7
font_02_sfnt_off00011166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11166 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1