Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a88b38c9f51a50…

MALICIOUS

PDF

90.4 KB Created: 2021-07-26 22:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ec2d1d853544c46611c8b11dd6090dcb SHA-1: 399fbcf3331979f862f30f482368c65f694e4aea SHA-256: 72a88b38c9f51a50ced55733f24fc84c50aeff7985e9b946fea5e28b85cd45ce
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these links and the overall structure align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/46054c6587e2ad7de53ca863e2096ffd/93937965976.pdf In PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a94763a9405---71972097111.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/2883fa8f9f26d8863ee3d525353b2109/lemodebasuwapujefo.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210610090446.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/30939571768.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/7fa1e5c5cc5e25e6c634600d87767ff7/56689176506.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb7cae447---vidilubunozapad.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/884d93d2d2cf65aadab42692460addb5/nazijurixubinod.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac386f9dba1---balipidawonirozar.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/n2msr661v6oouo67d63hodpps7/sojugijafesaduwekapezowis.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/pegofosolet.pdfIn PDF document text
    • http://www.nomorcantikspesial.com/file/jomifutalepitixor.pdfIn PDF document text
    • http://benhvientantao.com/img_duhoc/files/9433573591.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/figebuvogotumop.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/tifatunusofurap.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/9dkttl049lenhv49msc2bkgbo0/zipaxifemotowal.pdfIn PDF document text
    • http://fotossc.pl/_files/file/41128860912.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/dezaritorinexukileberu.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16080dd80d4f22---gesen.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160806dfc2916e---47289152303.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/f4d22d4256ced8761d582624ebcc44db/94794921522.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd4523daa8---zifefasotanarupuxovupitan.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/1035589928.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c7d18d4ec9ddc337033e39f86f67ff8c/wusiworarimukafex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=la+divina+commedia+semplificata+per+ragazzi+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_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 11048 bytes
SHA-256: 86e34479fbc7a8ff597f67b8ba4246c81484d98a296d822aa021e959abf505f7
font_01_sfnt_off0001155d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6F 17668 bytes
SHA-256: 15319023a33b0586fa5637397a807ee3f60d0c6c02fdf2df06684a1f0cba95a9

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