Malicious PDF — malware analysis report

Static analysis result for SHA-256 50664f9fcfb24917…

MALICIOUS

PDF

92.1 KB Created: 2021-06-29 09:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7fab976bd35a6df5104426412ff98965 SHA-1: a96dc3a14188cab33689eaf69dc08cc72d715808 SHA-256: 50664f9fcfb24917e77cad5b01c58f0ec328e125495962a0aac3cc184bc2e8f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It functions as a link farm, directing users to numerous compromised websites and potentially malicious URLs, such as the one found in the document body. The presence of multiple external URIs and link farms suggests an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://medvor.ru/uplcv?utm_term=pokemon+fire+red+gameshark+codes+rare+candy PDF link annotation
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/7j19dina6tokb82ov7h6btkm4k/pemanajuwifivokadaniteb.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41e685e17c---fefixaxenawopanepilifilov.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/696aq6noa9sh3sndjt8mejflsc/saliloxutowab.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/kezexedisigexovopipodirog.pdfIn PDF document text
    • http://bronia.org/userfiles/file/29158960856.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/netagi.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ms6vs7vjcd7h38358ml7ds3cp1/kalatiregi.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd768867a---79911657763.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202106221734594892.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/aaa31a454fc39771f06f24607e858662/10043740803.pdfIn PDF document text
    • http://thepdaitruongphat.com/upload/ck/files/kisuwogizesixil.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/e55d6f1327339a8625f5769ea7656ae6/31311450593.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/xerakekasixoke.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c724a5b7aa---solinumofawu.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076c551d90c5---vewerozigejozebojupezaji.pdfIn PDF document text
    • http://vejwun.cz/images/sizavowibonadomubinokej.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/72478758182.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/dokaziv.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/1a12ce35b032514d80ab49be09859369/75771580542.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0f01cb29d---81946942352.pdfIn PDF document text
    • http://learningkey.org/userfiles/laxerikovum.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/66944104156.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609190ad45d76---ramivabuk.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160b056a0c22c4---1160942538.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-8/20210608041925442820.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001053b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053B 10988 bytes
SHA-256: 10988ae6503048f6e040121886f858a03e7c7635295d570d1b2c855eca3eb99d
font_01_sfnt_off00011e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5C 16912 bytes
SHA-256: 83c8e94055897d547cd6b8d0f1067b339542ac01c3a5d6fae438effa89ac9334
font_02_sfnt_off00014aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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