Malicious PDF — malware analysis report

Static analysis result for SHA-256 1168d8d53c92a1c5…

MALICIOUS

PDF

92.5 KB Created: 2021-06-25 17:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: bafa754d20c9b9c844476d801ee72899 SHA-1: 70a7b6e0194f0a3eea5779953ca408073c7791d1 SHA-256: 1168d8d53c92a1c5ef28a51cef1b976f113924931f98f669c3f82aa2caa2da20
96 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. The ML classifier strongly indicated maliciousness, and the heuristic firings suggest this PDF is designed to redirect users to potentially harmful content or for SEO manipulation. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • 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=ark+how+to+tame+a+gallimimus PDF link annotation
    • http://tuzvedo.hu/elemek/file/jitaduvevulutalinukolej.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931a2711028---buvizibimo.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087225e6db81---sizurunerutizin.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16073e215c13f0---40901911785.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/rujepigejamifipolejibaj.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc8fd33bda6---2878224543.pdfIn PDF document text
    • http://mosjob.ru/images/file/41921605796.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/6vacas5gmhcivb07fgat16o9s6/76652099832.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c3f7555f8---lakewali.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2cf8c1b9e---debusajujavasopojezivivap.pdfIn PDF document text
    • http://armanetti.com/images/tabojuxanegagexewajar.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8f01c3013---govaweroleponaw.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9199d7cf8---wulewox.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/luloxu.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/vevixirixaruzeg.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/85801551127.pdfIn PDF document text
    • https://inncredel.com/uploads/dojaguleximo.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607496ea2c38a---65999972432.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759a2a746e3---7266896242.pdfIn PDF document text
    • https://starwebline.com/calisma2/files/uploads/zozobewajev.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ad859affe8f605a23fa59639d940b526/51579392003.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/4b6d6ef6a92f23b059f7b4cb4aba4e8d/88829926354.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/jm857sc0h9r4lj9qk9ccvn8hq5/kulukofosi.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_off00010474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10474 10708 bytes
SHA-256: 70902e4e5dfed91939a88d8778a7f563bb73fc889288da4239136dd0761c43d9
font_01_sfnt_off00011d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D27 18468 bytes
SHA-256: 38231e059fe0b60054766071f6e7786d53bf0017ec0a8a310ca1404f522b3c70
font_02_sfnt_off00014b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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