Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c9f0d5f0ad4dc7…

MALICIOUS

PDF

77.6 KB Created: 2021-09-03 08:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9d7a6c963b2084f2d8b4ef3c79ad7f7b SHA-1: 071eebd488ac4737b7eb36082459a0cfdec8848c SHA-256: 61c9f0d5f0ad4dc70c1bec0c820344987a409fdac2687dab10e6b3bfccc487e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to PDF files hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of external URIs and link farms indicates an effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://irlanc.ru/uplcv?utm_term=bluejacking+abstract+pdf PDF link annotation
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/23ef6ee73857c5760ff77cb1cccc850c/somazugi.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/73963801377.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/59891068725.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/julufidibubemipupufof.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/45215087005.pdfIn PDF document text
    • http://teresachild.com/upload/files/83000102560.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/b099c22d528f508475986bdaa70aa66e/77639507246.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/pogenivoxeluva.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/37038505234.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/75238135255.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/79310868442.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16073a8aec84aa---pamulepelorenulexerosit.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cd26c739d---zilamavoji.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/e25e56715eab50b124dbaaa3cc39f681/8924866929.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/a0da0db44f0d071302299552fd1dfe4b/kudolupunegafewixokave.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/vijaboxusa.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160849694e848f---fojojufuwagudera.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/simujewenuzaledalop.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d8fa8f61b67fad0934f9ddd0a9ef36f6/juzobolezezurajobu.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/dodewasolojugifosiw.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/88293864643.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae0e2649e8---63808571628.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af68ab84e1c---61088786698.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_off0000c320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC320 11192 bytes
SHA-256: f73fee4862c96aa4c1aaa8b74786404ffedd30f9bdc06753569146dcfa81ec9a
font_01_sfnt_off0000dd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF519 20680 bytes
SHA-256: 9a792ae335d0dd43e77573f693d51a05654c6afef1abd8be2d094ffabaa9bbf5

Open this report in the interactive analyzer, or submit your own file for analysis.