Malicious PDF — malware analysis report

Static analysis result for SHA-256 57909ac6ae1ef9cc…

MALICIOUS

PDF

94.9 KB Created: 2021-08-18 04:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 874cd85226974b940309fce54e4e93c8 SHA-1: 1bea19b695557bb6269a277d3db3a84c4d3646b7 SHA-256: 57909ac6ae1ef9cc94ad5b9eafbb59314e63c1e3b691d04c1b4a5a03189d135f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure strongly suggest a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://wastran.ru/uplcv?utm_term=the+divisive+politics+of+slavery+worksheet+answers+key PDF link annotation
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2b6a63174479c38326dfaecd22c14a9d/monolerogaxixatudezug.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087c36b1b883---fopewoxazunojujurovugipu.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/33768029743.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/66825613232.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/34276836354.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/42040149322.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/misanesezolela.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/8a0ba95a7eab1336977dbf1e6d02daa6/73893517430.pdfIn PDF document text
    • http://e-cluny.cz/UserFiles/file/81493670383.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/r0f0n5vn6lbhojillnvs8ndnpd/zidofuzuxofinubewemurizo.pdfIn PDF document text
    • http://hamandeggsclub.com/clients/e/ee/ee862789ee8b59d3f3d22261ccc35c80/File/vusuxinororirufotog.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/33370709696.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/vewesoxoripepasa.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/revidi.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/ap7si0ugge7kujj4op0gn0te9k/42768800113.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16102513b92c24---mubarefasefusefolebuw.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16084f8e2081f6---luxizofokig.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be53ce7dd67---mavuwetopupelulekemasuwij.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f64652bb6b---vevop.pdfIn PDF document text
    • http://altinay-law.com/images/file/21833186242.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160f51f5d43855---dalaxedafexatuw.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/fidomedatavin.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_off00010c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12457 17024 bytes
SHA-256: a0ce0bd14cf7b5747afd53cec6c6c279928a339ddc29c007a371c8dab2e8734e
font_02_sfnt_off000150d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150D8 11036 bytes
SHA-256: da86e8b4c5c2bf1ec1acbd2fb5168f1dda114163423004c2ccfdd7c7e363525a

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