Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2c51d8aa2a7fbc…

MALICIOUS

PDF

79.6 KB Created: 2021-08-17 07:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 643e49deb836f2abaf812d0d61bc09a1 SHA-1: b130391a8ea44a2037a38af1e909687177a6210a SHA-256: ee2c51d8aa2a7fbc36ddd48fd15b73a214d03c8dcd51d433695c93071eb73087
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. The presence of these links suggests an attempt to direct users to potentially malicious content or phishing sites.

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 http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609bed43853c3---sofujanam.pdf In PDF document text
    • http://epicridesnepal.com/files/najelesebusapasosete.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/diluzilenotodedazaxajoje.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/zixofefotutebegur.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/93982507779.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/5a05b9bf943b27df404638fe456ac591/39629099991.pdfIn PDF document text
    • https://derey.nl/app/webroot/files/userfiles/files/25816272453.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7e273f8ae50f76182fb52ef5fddc74af/zufifololadefevegigodena.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021052612092673499.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/52221604027.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/zexejuk.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/u90dfo014ctdqmrefj7u8tn6k3/marogozolakibevuziruso.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/864370ea2e64f108032cde0939cb07bd/77794739914.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/talazajikududefora.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/33969026797.pdfIn PDF document text
    • http://leguido.net/files/gezerabuzolaguf.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/17993348970.pdfIn PDF document text
    • http://yejida.com/userfiles/file/16940257997.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6a65333d1---nabudidajibij.pdfIn PDF document text
    • http://idroter.org/userfiles/files/28886750576.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/60319020168.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ancheer+folding+bike+manualPDF 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_off0000d3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AC 10968 bytes
SHA-256: 46208f0411b5b50c8ff76fced7780e228db1aed45e7a2ab5bd2bd2b6aed8cd71
font_01_sfnt_off0000eca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA7 16640 bytes
SHA-256: 9f6e769d4b1af239781ca2a6192c95a9e1c95327949cf47a75d64b2de40eba9e
font_02_sfnt_off0001180c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1