Malicious PDF — malware analysis report

Static analysis result for SHA-256 0064bf566938807d…

MALICIOUS

PDF

82.3 KB Created: 2021-09-07 15:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9ce53f5b10321f48649b93059c45cdeb SHA-1: 77fbe420b673315257e44e9b6992739cb135f348 SHA-256: 0064bf566938807dc5f3b7e2e3e16ad4f7834623785ad1e3df99a510b4404a2a
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL analysis confirm the document's role as a lure.

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://puppometalli.eu/file/wisixad.pdf In PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/lafuwuze.pdfIn PDF document text
    • https://polaria.cz/images/file/65126016139.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/faxosufu.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/katimisobeguvovowowojuje.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d401b46f30---buliluv.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/xiruxasugib.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/1b769ebce559af423984572947cf7f33/67512758522.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/19983399341.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/3472222264.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/m436l2u15ense86m7k9v8rqsaa/48385547615.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/jabuvox.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1c662ae67cef7b9666416415b1a8c852/84144624002.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/861380a3892a04218a8eda5915425a26/32673564702.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/93407096936.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/7f0ca0bbbca0765c4abdedd150564f73/ginugagotugujosazatu.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/sorapona.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c64487eef---2808273676.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fef892b54a0---retupekakidoxidigulixuwel.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/47537608383.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609404baefb70---wusikiz.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/98649680206.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/losomunezobetujewawati.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/79336137749.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/64109988190.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/625b40c26ad8a3e26891aee4870dd248/98710709912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=manuale+digitale+editura+literaPDF 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_off0000dbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD0 10228 bytes
SHA-256: 74728aa4fbce4ecd01d939ca7de9f72ac769a459694af454f0f37bf79cd7b9c9
font_01_sfnt_off0000f295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 18408 bytes
SHA-256: 8c7a0ae6629f924e31683f3782d26fe7cc1a24fa63af732983516ad0304e3b03
font_02_sfnt_off00012302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12302 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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