Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4e3a4e52a679ca…

MALICIOUS

PDF

89.2 KB Created: 2021-09-04 20:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4fcc7c7dee399a10916f8c9bf761135b SHA-1: 1b4e66637203468a3baaa2f8235c94738cf20dff SHA-256: 2e4e3a4e52a679ca7967a1f129f12dd10740487bdce13b3d5f984d2e0a1b998b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of external URIs and link farm heuristics strongly suggests this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://drafthe.ru/uplcv?utm_term=historia+del+arte+latinoamericano+juan+carlos+lomban+pdf PDF link annotation
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/928f60b69881b2eac9bd97284097dd50/lalena.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/qh8p9i1ki6nejmfk5gbj6cbg52/lowutajazezomojinozugi.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/8c84be46b97c53ba30c72309f1a6ad56/lozeli.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609427476ff7e---wirizokekobutelikimutojav.pdfIn PDF document text
    • http://gptools.net/userfiles/file/56813867214.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/sadozaruwak.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/voduvumenotale.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/mexup.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/44001018269.pdfIn PDF document text
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/c7c40ac8a6a45649dd054dee330eb6c9/tubokubimenirurajoxuw.pdfIn PDF document text
    • http://yongqingtech.com/d/files/30707148583.pdfIn PDF document text
    • http://raczcsalad.hu/files/76119802838.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160935bc436d57---5343643064.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/mifewurimomigunake.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/kemuwikexitedubavi.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/21711930664.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/26278841803.pdfIn PDF document text
    • http://sweden2020reunion.com/clients/e/e2/e2375cbe45a1e08e95d3a39ca41e84e3/File/jumuzumovaxaneg.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/59108722490.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/nobopar.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/6261556819.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/zifagogesejolaxi.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/ad77857971e2b9cdf72a62da270f68ef/41104456963.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80639078a4---58232613384.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/lofaloraxamukeli.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/02fd1c2d299f5c4f3b3bdb502b25a70b/futeliparek.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_off0000f2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 11144 bytes
SHA-256: 5f6326381da5e2c4c8f33d65e6368aa6f9e0019a81a67edceee5474581254a99
font_01_sfnt_off00010caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAA 19408 bytes
SHA-256: 6f732b33b302cb48f71d453d1d51a1f0341605fb01da18ede9ab128c7b33b407
font_02_sfnt_off00013e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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