Malicious PDF — malware analysis report

Static analysis result for SHA-256 670e6398f9dbfbbc…

MALICIOUS

PDF

90.0 KB Created: 2021-07-02 13:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 756059f8860da03b4804e63b810365da SHA-1: 6bffb3b5a7854cea94e51d4870c481612de642cd SHA-256: 670e6398f9dbfbbca87396cce487d91115ad895f7c8a8700446a0ce25dd45c6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose. The presence of numerous links to potentially malicious or compromised sites points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a56423b541---wulumabugebaneguboroxir.pdf In PDF document text
    • https://carparts-fixture.com/file/file/gakixi.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/motinalosiguxirunaperak.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097e7bfdf895---kilumejobita.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093daf8798ad---18523986444.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a48d46825---34964058144.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/44573552703.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/gaxokodamejivuvafazonira.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160db8ecc2ed44---98122469236.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d39b71dfad183a88ee90fd54d8b18ded/zifemotejujalizobor.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/durilejufopemobuwanopixi.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/23534256900.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/c73084606b8f9b1512f29462d86376e4/wufedotanike.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/nuzunel.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/76257211769.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/61025413039.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/jubefogadaxulefufek.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/644bbe7eb24efc191c8a38c854029357/65303811257.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d962fe4816---mukobubuzonelumijidov.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/suvebiponunidotowerujego.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/6247150023.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/35326055864.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/bbf42b4f2575c5d5e82f82969c8040ee/67213756445.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/hqh1j5l52u4fjib55l8m3l4g13/lefawonuvaxunituwaboten.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=1987+to+2020+inflationPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/06d9fe12f3745a963810bb44756f118b/63077656047.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_off0000fbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 10428 bytes
SHA-256: 1e6c4becc76d46d7a7c548e03d7a178fe3c14c8f284b1faad9bf40cc8a2b5e08
font_01_sfnt_off00011388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11388 17596 bytes
SHA-256: 3ae4f0b30733da9a5045e70b26f144f2e175c17c05d0a98ba2fdc7293d88689a
font_02_sfnt_off00014110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14110 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.