Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52c6b885d0fc49a…

MALICIOUS

PDF

87.5 KB Created: 2021-06-27 11:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c283d03d6dc4d85adb54236c655edbcb SHA-1: a4bb303be1e75d52ea9db4fa73fbd4f1d736ff72 SHA-256: e52c6b885d0fc49a3b3311cf0b32288d422d72697b6e795cfcfc2a756c4b3bf1
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV confirming it as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to compromised WordPress sites, likely to download further malicious payloads. The presence of external URIs and the 'SE_INVOICE_LURE' heuristic suggest a phishing or scam attempt, potentially using embedded JavaScript to facilitate the download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://wastran.ru/uplcv?utm_term=letter+of+intent+construction
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897ecd47785---81707227202.pdf
    • http://12shio5.com/contents//files/89879074073.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/02379195e2fb390dd3f233701f302296/36588922185.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609657213a56b---lijakavevejaxitetita.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e176cbb97---31017160423.pdf
    • http://amadpich.com/userfiles/file/37907336050.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/d29d4ae3e7bd9e8ebd0f2ad739e3da1b/98603590040.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d23fa44576---44655402854.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/05232be929391f495818651396a7bc65/40918022614.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/37743d3d5e71494346df0a5f9cfe9aba/bowebulevelafifewulifalo.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/hhcdhbdr3klp8vqkhb4ubvhke5/tubagajukefabijoz.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/nlcn68oiui6r7ck0oumllpr65k/zowapemoxiru.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/c2e0e87620b0457883120c3b5b6d124d/33663675325.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607e79f401b0d---91273268772.pdf
    • http://nguoigiupviec99.com/webroot/img/files/zuruluvofavet.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d023a98f5a0---42146235334.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072724801812---89709452051.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/fa4f3f962237bbeccc964add6484c439/73601428719.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/f509f03ce57e069e4766ab038ee9fc3c/dumelokunivuvelaxe.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a3e52e495d09127aecaadf12b80d7fcc/46340270532.pdf
    • http://novussiteyonetimi.com/uploads/file/94048205487.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/f0c886ece88dfcda0756ba31826b6ef9/49631487386.pdf
    • https://abe-rdc.com/userfiles/file/59808793464.pdf
    • http://halaljones.com/uploads/files/zodokekave.pdf
    • https://bloomland.com/sites/bloomland.com/files/paxegimumunimerixifami.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/b14d420c48f27b1c180f66d23ddd8011/salizoletiluzoxobefal.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c92921eddf6---nonerepemomum.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160904fde5645e---17554973045.pdf
    • 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_off0000f51d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 16792 bytes
font_01_sfnt_off00010d2f.bin
e7d3a9957663d519d2b34470b8497a755d2e6b711453ba8aa73ace620dad90e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 17184 bytes
font_02_sfnt_off000139d1.bin
8efe140ca1a39425b482f9fb90c42f0290be8e24b06a489f8df4e845488f04b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139D1 10176 bytes

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