Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b36ee57510bf89…

MALICIOUS

PDF

81.5 KB Created: 2021-09-07 18:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3fa05b096519aec7d76467a20a502f9c SHA-1: 209c110382c2b2de82fcea831b90dbc43f5c1799 SHA-256: b5b36ee57510bf896504203578c9d7ade15f036676a606785fd0596915c553fa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user to a potentially harmful destination, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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=baghdad+history+pdf PDF link annotation
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824981256be---89103747172.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16104ad9514f2d---fuzofag.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/87289448927.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c4735be6326---98934136347.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/53868495678.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/digorasiba.pdfIn PDF document text
    • https://kcss.hu/korosi/userfiles/file/warosepobaxifewitafir.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/148deb799e2af183b4aa73c12a94f739/zisedefiguno.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/71171830182.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2ac90a58e---duluvuvoposemifi.pdfIn PDF document text
    • http://indemo.pl/Image/files/nagigej.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/21736603617.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b212f1d2d86---kupeguwanupevikosobobut.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/lebarorivutopibusolaxaf.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779b9dab073---daxawexonapa.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///38495764498.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607396209dbca---pobozokikojuxus.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160839632711b5---zinifijopuremamizapaj.pdfIn PDF document text
    • https://kumsalgame.com/calisma2/files/uploads/tamanamide.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/gaselasadupagedafabeb.pdfIn PDF document text
    • http://annabarons.com/files/files/sefekeboguvefibarejur.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/joluresek.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6c117979c---lodejefu.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/3363015139.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media//jomofeluramubozebakizew.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/ebf85adc580cba30218f44243f8c7578/defiperuzajujokodiri.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_off0000de65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE65 10660 bytes
SHA-256: 53053dd8333891cef4b4b5aaef2907e3a417b163e2cbb38cd0d0f1e024d3559c
font_01_sfnt_off0000f6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 16292 bytes
SHA-256: 388ed91b53606e7f0588c83564125dd3b3515143977a66eff69ce1a60b2007a0
font_02_sfnt_off0001205f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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