Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f62a0e74084b03…

MALICIOUS

PDF

71.2 KB Created: 2021-09-13 07:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 882f952b5be1de2b875ba1e10106fa5b SHA-1: b8415e8c833ca5aaba899229eb04b84016085529 SHA-256: 56f62a0e74084b030d71d2c320ebdad614d1d184c0b71f32550db532bc5ffec9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be hosted on compromised WordPress sites or disposable hosting. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=xiaomi+mi+10t+lite+5g+price+in+pakistan PDF link annotation
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/nunezodevirizazagi.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/jelubizazowezipemo.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613832490ff4f---61966811666.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/62449320248.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/pukanidiladenodaruvewe.pdfIn PDF document text
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/sibuxedipa.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/f7b3232a38b4d8c6add301875877edbf/77862908432.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/mesijozorulatijon.pdfIn PDF document text
    • http://vanhacollection.com/images/files/25871977534.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/10702153317.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/94631679619.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/48841176738.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/oqp05mofng79gs1lt6kjplmiq7/bepawuledugipimod.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/1f0b215bf559e614314c133c123e622b/dojunugedinegafubiwama.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/1684100697.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210910071055_622v99.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/54bda8cb3d6287ce508b78288812d8d3/nupafujo.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/84226396725.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/79553985666.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/goniwavibifis.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109122100368923.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/rajagexomeju.pdfIn PDF document text
    • https://siroyensao.com/upload/files/67191163317.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_off0000b4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DB 15780 bytes
SHA-256: e8277a73f4598b5b9312121d73e9746d26f615672548d8d60c19d7a9db3e8ccc
font_01_sfnt_off0000dd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0C 11124 bytes
SHA-256: f26b9bac650541b63b3ac09ee5e098aebfff894c6a3db0119468a1803592e69f
font_02_sfnt_off0000f714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF714 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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