Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc4d76a591ad2ed…

MALICIOUS

PDF

81.8 KB Created: 2021-07-03 00:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 19a8497b3f85d80b0bfb8f878c4459fe SHA-1: a7f1b1edb1ba05c969caba198077113c9416dd43 SHA-256: bcc4d76a591ad2ed321e41ae96e960dc5b8baa9d1089b7bf15eafec91d4f4f67
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9d3c439df---lenuzaxebelowu.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/tuloresobimiwobudonezugo.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/lidariparekisamikujoru.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/38777133291.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/xopiviguf.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b978409256b---28884937306.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/wegebasivikifurevotipomu.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/28690806917.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927806a990c---83326068362.pdfIn PDF document text
    • https://antae.be/app/webroot/uploads/file/xajiruxabebasisogawuda.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/37f21e11b968103e349ff0d6dc8aeba3/3365961629.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df7e533ba38---68236153999.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/8cd95b184f5fe6a05758ec09ac0ee9e2/29892558103.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/wuwoxulotezizazezunowa.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49249069070.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/8f8f00a85aae058f8c179bc5834dd993/37684246751.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/pjalls71p4ptadvmosiaqde321/wudewinida.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbfebaa89fb---49607473643.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/96415637862.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c929c9e700---65207819505.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d070a6b78---1385127525.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c863d1bcd3---95508388026.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a0f5a07d594e0acc53ef9b15f2fcdd5c/juxulenomodafenidipokeju.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/bujopoxawisutep.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/91431967536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=head+pulley+and+tail+pulleyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 1800 bytes
SHA-256: 3cd4d369c657b400ed180d2cad238ede43e40491065d8c814e5f7cd4ed622247
font_02_sfnt_off0000f2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 18508 bytes
SHA-256: 758be23648ac58f9e632c85cae1b72f0667b346c44464ade97fe34260e32d6f9
font_03_sfnt_off00012284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12284 10200 bytes
SHA-256: ae0bbbc75621cd7e5ce9c7d2a90d0bf3460564d4ea86cc85773694961c93b462

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