Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49ada83d68e105f…

MALICIOUS

PDF

84.6 KB Created: 2021-08-16 13:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 77f684de725142e090124c53ce4a2d07 SHA-1: aa77455b0e3badcb1ba6105b5eacf3cd12a37447 SHA-256: e49ada83d68e105f1327981c9a0ce76655ff2d40908eadb5b837d5f95e734f8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d812766ca16---64789391404.pdf In PDF document text
    • http://hatowo.com/app/webroot/uploads/files/68075079210.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba32e899ee3---tixebi.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb98b25af8---39947054118.pdfIn PDF document text
    • http://gdgom.com/upload/file/210616155247739479g5kz77vrb10e.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/didigebij.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/tojozaxupibi.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b54f65cb611---wofidafesu.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f076167be---kekigofarig.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/c34acf5d2d226ddcda36c4aa09b6003b/nudupifiwasagawusutevep.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/75861597246.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/xemalakalixibix.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160984024a4857---1359650050.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/taooplts7td9l81lesm1djqsek/gatitiruf.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/37624320438.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609733f081ae5---solusafasivusasiz.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/50434935743.pdfIn PDF document text
    • http://farashimirooz.com/files/73443500911.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/putoni.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/89232729802.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210528231040097.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/d829ce587462f02c7837dba05ab1f8f3/69448881431.pdfIn PDF document text
    • http://iucecb.com/files/file/27331589961.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/39301125375.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=what+is+the+similarities+between+homogeneous+and+heterogeneous+mixturesPDF 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_off0000e4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EB 16992 bytes
SHA-256: 921eea2e90873c24930e93ce06cc70833f7bc3cf6ef727c4b5dd98234adda60f
font_01_sfnt_off0001118e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A5 11116 bytes
SHA-256: 196188d7df6b97b88b96f06fa6c368daebcd1146bd50c4f06265a6ba3a7ae748

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