Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdac201b7801e5bf…

MALICIOUS

PDF

90.2 KB Created: 2021-08-16 01:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 89ec534661143ae0a83644f1813b3d76 SHA-1: 5c2bd14dd342ca6edc1167e4f7342eb719978bb3 SHA-256: bdac201b7801e5bf51f5e91e75e23262987dd9c2b814f7fb990928f632a2c238
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, including a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's used to redirect users to malicious sites. The presence of embedded JavaScript, though not explicitly detailed, is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

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://catamma.ru/uplcv?utm_term=creature+3d+movie+download+filmyzilla PDF link annotation
    • http://xn--b1akwe.xn--p1ai/userfiles/file/47219183277.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/rlnuodjkihj5o9io7t5b3d88jb/44482024620.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/95236934936.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/68825709007.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/73469099732.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/30046727056.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/kererudiratosoruw.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/42627994866.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/vupejujakomelule.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaab3e615cb---32516671314.pdfIn PDF document text
    • http://robbes.nl/media/files/gexuvelavifon.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073857e8cd03---rugusi.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/nubexekujoxen.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fdb765c9f4b---52034948949.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161180176bf12e---31866503191.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210801_71A641E2737863DA.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/q2r78ht0tuaufbsrunn6gnmjg4/1157082295.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/84639346702.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7dad18024---fobaporofijipokijufep.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/xokudata.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/53356051897.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/bulefo.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210531065615.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_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 17436 bytes
SHA-256: 10c48c142219d6d5b290791ab0f48e98bda3f06d0f16cf226739c890662887db
font_01_sfnt_off0001289a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289A 10976 bytes
SHA-256: 4fd6397e048f23ecf2e395f3cbfc489bf86c2711b8476c2e506c82765c788eef
font_02_sfnt_off00014234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14234 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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