Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bfaf347c5e44bb9…

MALICIOUS

PDF

86.4 KB Created: 2021-07-31 16:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: da5aa590e18723df9b224f42af68dce7 SHA-1: 7869cb629b4982f9c99bc29342905fba87f8ad48 SHA-256: 4bfaf347c5e44bb96412be9e2e8e3dcac6df259ad0d077e0ed14a7a8dccccbf7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://catamma.ru/uplcv?utm_term=aqualink+rs+owners+manual PDF link annotation
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd6cfcf985---pezabobabin.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/h0k4rqtlauphiknhkus3atkk81/87227588908.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/53435090467.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210609173137.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/6b31120071170dba9ff6284a47a714f0/xikagirokowevikikamonob.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d099032774d---vozafexixevemedeba.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/76773703270.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/5cdm8ohdb01p1nvdrlhg21vq11/riwetadefosuludilogo.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/mufupe.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b7e6c3c20---73751269293.pdfIn PDF document text
    • https://dineflon.com//files/waludafedarasawikaxali.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609566e0af661---nazetabupetomitit.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608975b8e5674---23599668550.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba186d9a7d2---16979239278.pdfIn PDF document text
    • http://ks-puyuma.com/CKEdit/upload/files/60740338031.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/13be1dfb7f79a857dc78894d59858804/dalonax.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/simubevivegudijas.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9352b7e34---97840250530.pdfIn PDF document text
    • https://inks.bg/userfiles/file/83616869069.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3739bcadc0---11260067427.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/cfc312604e0f1ead6d811ab47bbdeb18/tigisaduwavobomewufirakim.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/ddd12b74e5e14be215e03fac07ff82d6/83779349187.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/matibudebilipi.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/8b81081d383238b581cfc7454674eb01/kenevozixerede.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/51bddd22c51d221d180c4dd5ed93111c/zulafinuwulitebinup.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_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 17716 bytes
SHA-256: 67ff70422608692ecc739e0d8163c0979d93da81ae095752d4b54d4b1f2e2d31
font_01_sfnt_off00011bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E5 10576 bytes
SHA-256: a2b314c489ce86e0a085c61845d41d1b4734d080d741c05842d1ec6c221e4cbf

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