Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bac8fb94b3a11f…

MALICIOUS

PDF

84.1 KB Created: 2021-09-14 07:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 66ee048866de2ef3116b4c35391edb18 SHA-1: 4db807502a218052d1bce07b061384d67dbd57a7 SHA-256: 32bac8fb94b3a11f9ef3de4e8f449242e5cf0484fc13626794a7965ac2be6175
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms points towards a spearphishing attachment delivery method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://daiichihr.com/uploads/news_file/93134678000.pdf In PDF document text
    • https://artistprasanna.com/userfiles/file/65328140484.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/17776559582.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/23341893328.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/livezoxelaniba.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bf460fad7---basatubotelin.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/28870817963.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/joketudawomuzet.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/puxixat.pdfIn PDF document text
    • http://descanso.verareyes.com/ckfinder/userfiles/files/17421479493.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/dukogi.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210913182831.pdfIn PDF document text
    • https://comfort8889.com/upload/files/51351798360.pdfIn PDF document text
    • http://mallncart.com/userfiles/files/60168238902.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362591c9385---85879941598.pdfIn PDF document text
    • http://lejonhund.com/upload/54646589839.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/23767105004.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1631113168.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130dc99ac017---93775417971.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/gokogituxiwifed.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109110043515304.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/nadamosefoxibikuzobep.pdfIn PDF document text
    • https://agriturismoilcolle.org/userfiles/file/mudasonep.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/vuzorujufaperibagazawil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=driver+printer+pdf+windows+10PDF 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_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 17456 bytes
SHA-256: 4fdbbb80f7e05a58ed917acd947e8d0d289b26db07e03814f920b2c9e5b93288
font_02_sfnt_off00012a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A16 10608 bytes
SHA-256: 462906e5ceede73fd55022b87bd5d701bb1e47b74629ac2ca287eb2d89f7ea03

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