Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f120cc9e2ee10a…

MALICIOUS

PDF

73.0 KB Created: 2021-09-25 23:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 058b252f14d626b82e0d8189209087b1 SHA-1: 4060c009f30a050b4a6ce2f52fb27ccc727ab64a SHA-256: 47f120cc9e2ee10afc633a4adc8901e90179c10722b1b215e21a13b84206abed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on potentially disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest an attempt to deliver malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://soundspace.eu/Upload/file/37100601423.pdf In PDF document text
    • http://bbbo.handyfriendship.com/upload/files/wamidutu.pdfIn PDF document text
    • https://kysig.com/app/webroot/userfiles/files/wodibidonomekujoke.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/38241741404.pdfIn PDF document text
    • https://heureka-cz.eu/files/50140308992.pdfIn PDF document text
    • http://ranchobg.com/img/file/veseguwuxakonom.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613843b7d470b---mukezevujo.pdfIn PDF document text
    • http://calisnt.com/uploads/files/70322890878.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/semukezikusanosug.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/pifanewifog.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4a39b58791ad94dfd0c7f8e3dfae797f/nedukamagetugulilunuji.pdfIn PDF document text
    • http://griesvoegwerken.nl/UserFiles/file/92930219244.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/19029783214.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/98215195349.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/sarisovikikopowikeje.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/kabujejeronaxa.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021092220460973499.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/50533966174.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613508a1698bd---fiwuvigakenumujifagi.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/tubikelatele.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/lowidate.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/dalop.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210920070111_pvkpfz.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/41058bcefafffe47d489d3d3e5f79378/leledojuwudunu.pdfIn PDF document text
    • http://unseretochter.ch/images/file/vikazawak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=application+courir+androidPDF 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_off0000b9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EA 17604 bytes
SHA-256: 380494ad695e9307c59ca012653a87aab077d78a6f59c787a932cf71cd7c89b0
font_01_sfnt_off0000e737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4E 10288 bytes
SHA-256: f942097ce88cdf4420ed51cc5b6f22f893164c4ccb90782016358e8088b2667e

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