Malicious PDF — malware analysis report

Static analysis result for SHA-256 329708ec1615b1e4…

MALICIOUS

PDF

81.7 KB Created: 2021-08-20 13:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5c1e70f9624c4c98d922d255d6b8d80d SHA-1: 9fbac6a1290db9e353b1c7cc7d9afbc440e9b7b9 SHA-256: 329708ec1615b1e4b61bbb14cf8072e37afadb750c82a7a50bfec5c102150153
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a tactic to distribute malicious links or content. The presence of external URIs and link farms strongly suggests an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://wastran.ru/uplcv?utm_term=balloon+tower+defense+6+mods PDF link annotation
    • https://hotel-la-licorne.fr/userfiles/file/25562541905.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/kobel.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210705234542867583gkglex.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/68fd32de860af0a0b081751261d688cb/23540761190.pdfIn PDF document text
    • http://katachizu.com/img/news/files/bakapupikoxabadirem.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f507c88acd---98463167081.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610ab4cd297c7---40720254014.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/12484288975.pdfIn PDF document text
    • https://fasaac.org/temp//files/dazipixodeniliruw.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878cc3c0ec4---kapojax.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789e7b01ef6---bigiguvowuwemilexofoga.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/mekoxusejugutuvego.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/zufufuteregalarisinujebo.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/70056019527.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/dg9rd12ulqtlttsp616ls9ngg1/15179607915.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/1b269c3bfa4fa400e1d74d325d605768/25943158092.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/16857803066.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/supiwizet.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/b4kgs8aqjp68j2fkehl74fe6iv/20000239275.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112ddf4d5a1b---1465931266.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd97ed51aeb---736335442.pdfIn PDF document text
    • http://freeski.hu/freeski/file/6895147075.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/71484866872.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_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 16916 bytes
SHA-256: 0f810db04749ee8af9668b6fefd956832749c7491f4bbdbae5c9060ccd0363eb
font_01_sfnt_off0001088e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 10732 bytes
SHA-256: 4252e7b6a84b0c08c6e05fc08661221c972d3a13d8d4ab4c4bb8320752c38bbe
font_02_sfnt_off00012162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12162 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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