Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fee45feb5f9dfc8…

MALICIOUS

PDF

75.1 KB Created: 2021-09-05 23:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 156e1825e9d6fc5528a40fef483ee40e SHA-1: 6ea527f04adf0f57b5fde73167297715e9a494e3 SHA-256: 7fee45feb5f9dfc822607e3e993cced264c78b03daa7f736d3731a1f1851f98e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to redirect users, with one URL specifically using a 'utm_term' parameter suggesting SEO manipulation for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://queure.ru/uplcv?utm_term=magnetic+field+due+to+current+carrying+straight+conductor+pdf PDF link annotation
    • http://hotel-ambassador-nice.com/upload/files/xumuwawazekobijofulod.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/doluzinowar.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/5585886764.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2d75fbdb21---gekizeta.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/11705959245.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/nazijilokowuxuwilur.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/30124220931.pdfIn PDF document text
    • http://www.pes.edu.mn/ckfinder/userfiles/files/mudotoruledenoso.pdfIn PDF document text
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/fuxusidarukitijazovuxulum.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/degapalowiwilikulu.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/napebudejakirele.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/47f7f827031d1c0752d25a0127e84aa6/gafuzijikifun.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c43a374aae0---70995671711.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749884ef730---saxivixuwefarosekejilil.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abc103dd20a---46385768048.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/52434997368.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/terepisamuzudukup.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b04c20cd16---38667984651.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/96887757443.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/2211669893.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/51477871576.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fcc709e26---kunexupoji.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3a6de1d237d6f41f147bd5751489012c/40916219571.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160ad94c3e0581---63327261620.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_off0000bf53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF53 17500 bytes
SHA-256: 7febea7412914c24b180b9734e46f8a66e9ed52ce5b5b9fbbe8303cd0ce4796a
font_01_sfnt_off0000ecf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 11108 bytes
SHA-256: dc8cfe98049333ef02077ca10d57c00f72bd456e0fbfa6be096c5ca1c12e88d8
font_02_sfnt_off000106a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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