Malicious PDF — malware analysis report

Static analysis result for SHA-256 015ef421a4179962…

MALICIOUS

PDF

84.4 KB Created: 2021-07-15 14:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ceddfd703feb917dc0851ad0ab9b4335 SHA-1: 3d68d19ac85b17a5accf80427f1a94eab657055e SHA-256: 015ef421a4179962d30a2496789ac2b48b93674efa66109e97465dcf4c50de81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to websites that appear to be compromised WordPress installations or disposable domains, a common tactic for distributing malware or conducting phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or serving a malicious payload via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/31c0931e7d7bce39865ac3a710b76c8c/zojigekamikazewiri.pdf In PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607343142514f---5138933976.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/jamojabisijotelu.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddfc01f85d---buvagexadakerereze.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/wafiguwusaduwu.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc29a5db1d---kogakere.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fa434e8dd---4514255980.pdfIn PDF document text
    • http://bmhs1964.com/clients/a/ae/ae3b7fe25fc1fd458a9bccd7578bee9c/File/74122509061.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/d191c584c523ae673c77e66b590fb7c4/gunaxoxomofulama.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8da4070863---xoletipisinitejupin.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/dikipatitip.pdfIn PDF document text
    • http://minicabii.com/survey/userfiles/files/zaxurirutokawepiwobotexo.pdfIn PDF document text
    • https://starbox.fr/img/files/91771419785.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/mugiwagatafub.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bee84d98237---27283189390.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/87172100900.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c3ff609d4---3397808463.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a84910b7c---kurimivozosareloxum.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608423132ce8a---balejugimari.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/bazebugomizalu.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/takodalero.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/12512649803.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/rosifiparebewafovigaved.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6e2178646---dekileronoluxakeka.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/7edc97eee27da0c02fd338908149ba32/zedibimuvezigiwuduk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=word+for+data+collectionPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 10296 bytes
SHA-256: 85a1c451b91fa22a2710debba3932caffe1f1a8757c3d35f6a585c85857da25a
font_01_sfnt_off00010142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11954 16784 bytes
SHA-256: bcc5d300ade9741068e9a0f386ce2c872b493528c9102f91076b6fac68ca67c2