Malicious PDF — malware analysis report

Static analysis result for SHA-256 807a54b0fd8a361f…

MALICIOUS

PDF

87.0 KB Created: 2021-07-18 10:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b0d8d83281ba1dc826b1e2d7a3025db5 SHA-1: 52422dd2179033d0b9bd8dbc384b34b125a47b29 SHA-256: 807a54b0fd8a361f346ccb18feff79c7c1bd71dbe1e8c1e937dc2094a6f304f1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to direct users to malicious content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://cafemocion.com/userfiles/file/pazubin.pdf In PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4eba87e76---89733984431.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/72914294151.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e106f3ebb12---bilapadixep.pdfIn PDF document text
    • https://htchninc.com/d/files/bebeketufadojebod.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608183d4bbb24---80384618292.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609a086879868---papofemuzu.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f2d17b55b34---88259896364.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/45181626221.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/67867575692.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/78962385871.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105252151.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/somamavivamofaxu.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160797f81dab38---pukoj.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c770d9acc2---42164224142.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/zukoliwajakegerisepokemek.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/76853367975.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/vukiritomekoxo.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/lokine.pdfIn PDF document text
    • http://jrjohnsonfamilyreunion.com/clients/0/09/090f04f22b165063c0e57546eb93b169/File/91363137528.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ae9f89af8---biretiwozekumisizoforiwa.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/79985129942.pdfIn PDF document text
    • https://turbooto.vn/upload/files/62671945833.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/silusiluxinebofam.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160765e166fc1f---35794603848.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/76cb6e30d9a8d87e8e61a7c7b5f9cf39/32392499230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=informative+meaning+in+tamilPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD498 10404 bytes
SHA-256: b6a74891a365569436990839467841b102c406dd71e0364a3158971ff444dadd
font_01_sfnt_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 18392 bytes
SHA-256: b0ac66533df6e57984acd0d2467fa9e608f7d9501e6797cc049cc32210036766
font_02_sfnt_off00011ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA5 17100 bytes
SHA-256: af6352c6d9b0e605407c38fa74e817a8d81e4c92f12c4f8e92d0996264b0d156
font_03_sfnt_off000135e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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