Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0a0abf29b9f8ff…

MALICIOUS

PDF

112.7 KB Created: 2021-09-05 11:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6fde520ffbf736922ca9e526a945c97b SHA-1: 1f64a19ab1bca4d8ffa831eed344707b518e4c93 SHA-256: de0a0abf29b9f8ff5f9c888992f7099423961a3b1f8f79ede5155151915a154b
176 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The 'SE_ENABLE_LURE' heuristic indicates the document likely instructs the user to enable macros or editing, a common tactic for malware droppers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 http://marine-inox.com/i/File/3534376680.pdf In PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/j60rln31vsk00g9sfarbjgpf09/75527818062.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/8d029fa1d2a6b78550fdeba4ccc84ca9/87039983693.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/dodulukukumujese.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///87047691559.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/54451907911.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/dirusa.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/58194743130.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/vml18aenujotjbv4titknnb8kt/sumojugomagoxepuxuvovesub.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/rupufujeme.pdfIn PDF document text
    • http://cissi.it/userfiles/files/wenibufove.pdfIn PDF document text
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/mixatowalafudixobemuleroz.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/8b51272b76d613a0429c8fd5b49d9a7e/91591648020.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/waduketofu.pdfIn PDF document text
    • https://0800-707-808.com/upload/ckfinder_temp/files/20210724214959.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/mariwutiviwabufepekukabeb.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/49806416563.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611fc0123895e---11231777631.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/wobagogewogovagojar.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b325aeb6ce---45357348736.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/cedaaae645c0811b77cbdb59cd715084/zotesanexelur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=diphtheria+disease+pdfPDF 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_off00015330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15330 19600 bytes
SHA-256: fbf47df64298e9ae4906cfa072f7972e25e1b9947cc1e4c833110a2f37cd5ef1
font_01_sfnt_off000185d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DEE 10324 bytes
SHA-256: 074de9ebf93010b131e4275f0c560d93b2da97db823aa1fc00ef55d1e7c41723

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