Malicious PDF — malware analysis report

Static analysis result for SHA-256 59afaa1a68b51279…

MALICIOUS

PDF

212.0 KB Created: 2021-09-04 07:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8887051e83ac98f2f174d7718ced2866 SHA-1: 08ca13bfbf1f78b32fa2d88139e05899decd0389 SHA-256: 59afaa1a68b5127933f2f8ee59c4ca329e2c60048bb71b3eb5125d0f5d6069c8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting it's part of a phishing campaign or a downloader. The presence of embedded URLs and the ClamAV detection of 'Pdf.Phishing.Trojan' strongly support a phishing or trojan delivery attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

Heuristics 5

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=structuralisme+definition+pdf PDF link annotation
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a526170f85d---89520495073.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/9126583286.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/10qk0ik4eo5rafn46p51p153g1/tumilis.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/161201e9e21687---31139512464.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/74345391914.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160af0b95433a3---1313324934.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/nupivopasev.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607485a41b575---falipirudif.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/42401a804efa6acd1d7ecf4237c8474e/44736895715.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed443ba22f---lukowadajerowefara.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/vafegewexovanor.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/qng8ph901l8273j0tmnavsdhil/folagol.pdfIn PDF document text
    • http://ymmicro.com/files/files/65060651514.pdfIn PDF document text
    • http://bjallstar.com/upload/file/tagigile.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083157035062---divufoduzaren.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/fitadimobajar.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/c532et5i7asuqp3a86nr5vg9u6/getujiwusumitixor.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/63872569717.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f68c84eeb1e---58183061199.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/woxasirewan.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780c3a4bdeb---wuxokiburizofenutivige.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/pq5o2mdid4kp14ena3bniuu8bl/5783009676.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c948b79e08---29602022303.pdfIn PDF document text
    • http://cymagun.com/userfiles/punizatigivipa.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abb51eb80ff---xekato.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_off0002d37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D37A 23788 bytes
SHA-256: 3282434d5196513fe7651cb35264811a11e7551636e2ba65f8b0869a411f0476
font_01_sfnt_off00030ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003280a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3280A 10956 bytes
SHA-256: a02d2d49bc23d3657fb2e3ed0ea8f336c96335dcd44d5f0c1479d52a05691982

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