Malicious PDF — malware analysis report

Static analysis result for SHA-256 c626f4f47b7c6972…

MALICIOUS

PDF

81.4 KB Created: 2021-07-26 01:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6f85c8e2c2062c940a33425e0c6e1ec8 SHA-1: d487f1d50f94caf7a05bdb4ed7c3ecd37197683c SHA-256: c626f4f47b7c69722da49fb4066b69c04995eb6a953cc3ecdc30d8944ff2256e
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. It contains numerous links, many pointing to compromised CMS uploads, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or compromised websites, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083d6de343e6---mobegimoxonazevatomosudu.pdf In PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/9baobkvefhqdss3q8dfb2isk23/fomazugukorawojo.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078367c40372---kanozutodinezulakavowov.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/35205052157.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210714075701.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/3139611293.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/nodegilurenizukepi.pdfIn PDF document text
    • http://benhvientantao.com/img_duhoc/files/sokadagogorozo.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/totatediresijujodejodozel.pdfIn PDF document text
    • https://edusfera.pl/upload/file/483137109.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb8d759c02---93557664857.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f207beb35ef---mukujoxiloj.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/mereledux.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/82433678060.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/madidefilu.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/a86c7ce02472fc5852dfebf30a2b3b2e/19859813312.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/naweriruvujadilaxuw.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/cadad157180fb44a14c6da8a40468485/80826461138.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/45553053077.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160727f2493560---lumuresasolig.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb67681ef9---76107530513.pdfIn PDF document text
    • http://cuiquji.net/d/files/30649386343.pdfIn PDF document text
    • http://miele-service-center.ru/uploads/files/77082460695.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63430624377.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/21872097990.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=basic+concepts+of+analytical+chemistry+book+pdfPDF 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_off0000d9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9ED 16932 bytes
SHA-256: 3c44b119a048f4ae2e889332591e6f7bee5355f30ea868c999c27e727cbfe704
font_01_sfnt_off000105c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDF 11284 bytes
SHA-256: f11599bf1edced2db2cb05c1f14505a67e2e906cf4706017a03eabcffa7dc3af

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