Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0514090295e636…

MALICIOUS

PDF

114.7 KB Created: 2021-07-05 21:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 14de99c08a2b1ca18a07b8d02988b957 SHA-1: fcecf6818a0356fbaef214944f696952cdb66a31 SHA-256: 5e0514090295e636f2ff4278f1c597ddc7b79866657ead3be2f561692b218063
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple compromised CMS upload links suggests a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://mistral-paints.cz/userfiles/files/vanewelakuxorezijug.pdf In PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0b3f07e12---bifofegapaxelikanad.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/88179777900.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/30117271852.pdfIn PDF document text
    • https://broodjedenbosch.nl/ckfinder/userfiles/files/kewuk.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f080a6ab3c---29421375735.pdfIn PDF document text
    • http://aquatherm-graz.at/files/fopan.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b776cbf05db---70934845471.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/e9b268fa3713c7735f4ca5987ae93699/rosujimiwipukedale.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/sefujad.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/24715361849.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/2b1d7581494ea5582c1b192a6980edba/38102397771.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/sb8os8ovlkpb3j7u70ds6dh493/17222935445.pdfIn PDF document text
    • http://hncastlecable.com/d/files/61216493382.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/13301304011.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608032a263cbd---27237053532.pdfIn PDF document text
    • http://wohntraumgmbh.at/29750626314.pdfIn PDF document text
    • https://asi-filter.pl/files/file/sanotabugamugixul.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/27336442787.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/92b778d2b18736b0176f3e1fd7402800/pavatoxez.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/32028015299.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/t9asai5i42ghnu71to9tkgdovp/bowewifowumofaxurokagow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=what+year+was+i+born+if+im+27PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E02 17624 bytes
SHA-256: 01362ea31a7f321db45bd40f3bd57c77860ba63387b18199c5595f503f33340e
font_01_sfnt_off00018c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C68 10936 bytes
SHA-256: 2bef3250d31b53d7e9c75c67f4c4775b7cf1e361081465a5f6fba77965a1a36b
font_02_sfnt_off0001a5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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