Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a5a312f7be59cd…

MALICIOUS

PDF

156.1 KB Created: 2021-06-29 10:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5bc6d0130522c6648b2610f2f4d9749c SHA-1: f0fdee69060258fdc6224e82a687763b0874e247 SHA-256: f0a5a312f7be59cd8b61e530b0ec252ecd8fba193020cb9276eb1f02abb897a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

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://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ae3155c6e1965618630e25437facd680/58519406575.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d40b21588---83945471406.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079574e3fdc1---31066388837.pdf
    • http://accessiblevehicleservices.com/userfiles/file/nikuvolulemedefiw.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/d6625aa46753340a2f99f1bf0dfcab08/nukezema.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/ca53b0854fa8fdb6888792f8a0f6982f/71613827063.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf573390d1---nipusinujivesaw.pdf
    • http://hanhthien.net/uploads/file/96970461204.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b54a728b79c---vagebewo.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160896552e142b---fonowulinenoto.pdf
    • http://saatgaamkansarasamaj.com/admin/uploads/files/69805928891.pdf
    • http://retroldn.com/userfiles/file/paxafepusalupewelap.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/7c516621e9641cd88dcbf286c771d018/61955195452.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7f326fcf7---duwavenokibinibobesidegum.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc60f9c3ee---fages.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/1de62d3345e8634967eed111c99a1e48/88831950867.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc2b166e8c---12649883160.pdf
    • http://omonetach.pl/foto/ilustracje/file/52931706952.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a26d38b886---84061324791.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072f3af0c9c6---samepibomoxeruzajafoza.pdf
    • http://kasargod.net/uploads/file/vexefoni.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f699c739f---54254904235.pdf
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/73308000551.pdf
    • http://karimeh.com/public/userfiles/file/45752277279.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/bc8c1e8d821cdf908a9f6b34131157f4/77927631976.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1aacb079c---bokadedajosuwefo.pdf
    • http://soflocops.net/clients/81266/File/lenukej.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=iron+deficiency+anemia+breastfeeding+mother
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ff9f.bin
12cc3e2eafda7b8c0f0a5ce73ff4f34c7acd3e33455c2de23452983093654639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF9F 11080 bytes
font_01_sfnt_off0002191e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2191E 16792 bytes
font_02_sfnt_off00023130.bin
b1027e2feb8b6c6eb843d7871f61acf18c4cb17728459f3c15b5c416917b8b00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23130 18632 bytes

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