Malicious PDF — malware analysis report

Static analysis result for SHA-256 690d45f09215e2fd…

MALICIOUS

PDF

78.7 KB Created: 2021-09-03 22:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 96ccd7529fb628bd45bbdecd7e2bc652 SHA-1: 5d5f68e5469ba6fb0f335daf2e78e5f6520b69aa SHA-256: 690d45f09215e2fd3c2a603ffc26313afe21487c5e29aba1a8d3de6b64414cec
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous URLs pointing to potentially compromised websites, likely intended to redirect users to phishing or malware distribution sites. The presence of multiple external URIs and link farm indicators strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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=adiccion+a+las+redes+sociales+definicion+pdf PDF link annotation
    • http://legalinet.eu/userfiles/files/69070565432.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/21328294468.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b292b74d44d---muxubuvuvidodipiwubuton.pdfIn PDF document text
    • http://praguetransfer.com/files/file/73564377733.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/6luumirc7cdc97n5qukm4vco12/pakukolonarer.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/0a02e4b0acf8cfb4ad95279ba44cdf3c/91118097955.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/189ee74a925d39775f0308849af62dba/kipobavefafefop.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/b58cec4bc102669d1753e865730a3982/19708458533.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/14356876198.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/88758103439.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b1b7f31e8---44279145055.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/zozesuzazivori.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/velawunoguzaguwuxulojodu.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de934077507---55615970725.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/fujarimetos.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/e42b4489e6d482ef4cdb6d0a00b22ec9/tuvetadavamona.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/akcrd4pbjul4lfa87g2a28o103/39476934969.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210810012717.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/30453899104.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941d3d201b4---6687242821.pdfIn PDF document text
    • http://skyrybupaslaugos.lt/uploads/files/gudufo.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/20925146797.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607643a3b1cf6---5614767301.pdfIn PDF document text
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/74037120983.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/64412649179.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_off0000cfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD9 10496 bytes
SHA-256: 06b4443f4fd1ca44a78a664d61a9ec001c6d332600622425bda90311d3994fb4
font_01_sfnt_off0000e7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 17084 bytes
SHA-256: f5666cd885c8960cf4d75c2a101cccf0dc2da8cc96c6a0a3c3a96b7d94fc8cc5
font_02_sfnt_off000112bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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