Malicious PDF — malware analysis report

Static analysis result for SHA-256 740c0f6db38d85ec…

MALICIOUS

PDF

91.7 KB Created: 2021-06-29 00:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 58628c5f4158a607b7b299d044fb7b62 SHA-1: 3fb91c3471d3043038d34f591b4a7e05f43797a8 SHA-256: 740c0f6db38d85ec1f64348764afd6731660845c670932a5299672a2aa21fc39
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the PDF and its embedded links points towards a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=harry+styles+and+taylor PDF link annotation
    • http://bannhuaduong.net/upload/files/xujakosilumudididudeg.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b9e0663c4---pesenogeterivugigumone.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/21353835052.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/c05075319e678f3f179526425aac4cb4/29404953743.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8a5213ee7---judoxofufudo.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/1m5kjdi2t7555gmesmldjjm4ts/zebele.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/7096056406.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/e9572bbae15ea4be46a1789e98557e74/95266868796.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/6iqkgckiuhkio2k6fj2uobp84d/supixuwimoguvetiwu.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/makesulinugoze.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/39231160224.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2322f2d199---20764615016.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e333e756ae---zebisemil.pdfIn PDF document text
    • https://mszukam.pl/dat//file/10756800956.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160708ad9a03d3---94382963513.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a923518e31c---kadutapopizevuditimapatu.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3b895bcda---70053411133.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ja3bf8kgo5j0j8ako2fhtmkvl4/75188046244.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/78520712933.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/kadigozitalutel.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/28593032358.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 16416 bytes
SHA-256: a8d1e34bf444334761db8dd673e30599a677bf9ec537d4b136fd145dfe542046
font_01_sfnt_off00010170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10170 18332 bytes
SHA-256: 6ced4b87b95d05836163e1b3ce4ea18846c6d67611eac0ca6da05430dcd09b5c
font_02_sfnt_off000131e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E1 10252 bytes
SHA-256: 8c5cf3c5f262baf4bffb6abb127bedecc17c3b689527553c37b64212f2c3a45d
font_03_sfnt_off00014911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14911 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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