Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9b7d07f81788ad…

MALICIOUS

PDF

75.8 KB Created: 2021-09-04 22:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 270784d14cd388a26977c0286805e59c SHA-1: 2d9318cb674b0c2a985aec4bb9ce5d50ec14304a SHA-256: 1a9b7d07f81788adfac817518cd62637732a0c61a294872feb7114280094b8f6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The embedded URLs, such as http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bae18562df0---buruvuzugijarezedaw.pdf, are likely used to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803d0fe2f60---bonigonilenerawefedotez.pdf In PDF document text
    • https://flyags.com/editorResources/file///2170836042.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/44844a4a4dfd499860a344fed4a9a32a/suvipuzilesesepo.pdfIn PDF document text
    • http://gibisch.org/files/files/97469346263.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/kifojizi.pdfIn PDF document text
    • http://computerdoki.hu/user/file/zibubulawotevokukik.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/5f0f1b62aadab878d760d29a91286a8e/45764631475.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b01b50d4553---37543043102.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/090747315531.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/tobapilujobera.pdfIn PDF document text
    • http://ducthanhtam.com/uploads/userfiles/file/pusidud.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/c1fef10fc3a9c1a3f2cc7b3f8cab0746/gesixipapakufaxutid.pdfIn PDF document text
    • https://termofriz.rs//files/5726056561.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bae18562df0---buruvuzugijarezedaw.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc288240d74---kikujejujodel.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/30f72efb9ffd436f2ef9e3c2951ec1fe/18882918222.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/67464609100.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/61462458098.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/77699311631.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eea57ccd51---37868966163.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e2bd38b8a---vakexomojikid.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f773cd6ed4a---navobutaxonir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=free+oncology+books+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_off0000c56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56B 10764 bytes
SHA-256: 0913f034e27513419b4f9ab77d66b46633e6bb4dce0250cca68e76db4f740a92
font_01_sfnt_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 16960 bytes
SHA-256: d686970a204e706e9b4f4c5872c096de8d010951b59250b11a4697cad357a2d2

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