Malicious PDF — malware analysis report

Static analysis result for SHA-256 6195f5fb712a48f5…

MALICIOUS

PDF

88.2 KB Created: 2021-07-08 04:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 790dc9cdb492b1c39d8458440dde08cd SHA-1: 52aa51761ebe60d651ee99bf59537d99fdc73ff2 SHA-256: 6195f5fb712a48f53126dda68d1c643becab5de0c555a922afdda758da862eed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pixomot.ru/uplcv?utm_term=how+many+units+of+alcohol+in+a+bottle+wine PDF link annotation
    • http://eros-arena-reutlingen.de/eros/userfiles/file/24055081347.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ef1daad29800717b8a6bad0c846575c/fowazedalatokubilata.pdfIn PDF document text
    • https://ovalpolycoats.com/media/75319022693.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c260465b1f---46082322403.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/zedovemimowufuwufewobize.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/28773466372.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/vubapog.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16087f2d825085---xubuvamusekagupirawob.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/83473589111.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/36828411780.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/cf896285ed662732f6e7a4d2e29df335/norifo.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/vebobesakivagaxovurewi.pdfIn PDF document text
    • https://dm288.rs/slicice/file/48046812603.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/71909495180.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cc048f7a3---84192943044.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/62825604099.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d3f70627c---ligonazuramerixunita.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ca2eea8e3---44184089299.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a1abe11ad34---97814356713.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/xizune.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/argk7ih92vp35r1i16eec47gl4/lamupobe.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16075a139b97e6---lebilagisadapifan.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/wonogosewakawatelazera.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/vezikuluxofi.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/812256c8c376fd1df50e366a64f7b4cf/31885495536.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F7 10932 bytes
SHA-256: c0c121a715be34d1bdf2630d777d5d22af3e328f294bc57b208726543bbf7e9d
font_01_sfnt_off00010e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2A 17432 bytes
SHA-256: 6cb368579e01011723ed0765710c12ec20efcb5695ad0147e2c9264d6447284b
font_02_sfnt_off00013b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1