Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0045dfcd178c6b7…

MALICIOUS

PDF

86.0 KB Created: 2021-06-28 17:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 485850d7af93984b64d1c382972834fe SHA-1: fc60bfa0cc524377402f03ff5e7b7491db17d038 SHA-256: a0045dfcd178c6b73ebfa522e3f61b258fd2ede7e91a357ac512b5061b2b8bb5
196 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a payment redirection lure. It contains numerous links to external PDFs hosted on compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to fraudulent financial instructions. The document body is heavily obfuscated and unreadable, but the presence of numerous URLs and the 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly indicate a phishing or business email compromise attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://chcial.ru/uplcv?utm_term=different+types+of+fund+transfer PDF link annotation
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/a6791c8177a7d686fcb652aba3f50c3f/notolupiwu.pdfIn PDF document text
    • https://topupdana.com/contents//files/favorijanezof.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160703851edd6d---62461512293.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/214ff026cdb6f9e1ddd4a82627ef154c/92251917570.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e431d94aa7---mifatikopab.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160917cdbab4aa---xawenefuzig.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/jibixozer.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607596ffab291---pisomuvobizuwuwizos.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/59839912507.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b227cb6b7d836c422969c8e60d83e48d/mofurodaponemo.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fed0f2f7c---82888660843.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/96a73a54a784afdc58c1280fe0733060/vamideva.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/gevetusojog.pdfIn PDF document text
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/wepomolovilapokilitikilop.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/9c77f019ce2c81626ed0c837702c5a5a/51984909483.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/70415890344.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/e4f069edd5d734b5e71c16f89eb2fc13/18868888449.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c8c696dce---wugunukebid.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9f68330af---59597893655.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/05a9a775d720fcb792591d1ddbe83036/dojefevogavuzonixu.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8b87aa230---lufovul.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/74349162737.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_off0000ef07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF07 10660 bytes
SHA-256: 96f1500a9b5fe7ff7a8b3c7a3a5055057f0ac38745caeb09eb8065833424d950
font_01_sfnt_off00010796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10796 16652 bytes
SHA-256: 64c9d0ca49b3bf77725a418214db15a0ea23370c184db178d49356e055154bf3
font_02_sfnt_off000132c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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