Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba45783426ba323…

MALICIOUS

PDF

73.2 KB Created: 2021-09-04 05:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b98df2045f56d7d5f8581b7d459a4349 SHA-1: 041ff78f4c80551e89ac26edbe2ba200e2ef0f20 SHA-256: 4ba45783426ba323f31878db51ba39a1e53b3edbc89a2d0033afbfca6046fa96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://chcial.ru/uplcv?utm_term=philosophy+of+mathematics+and+natural+science+hermann+weyl+pdf PDF link annotation
    • http://cartonwrappingmachine.com/userfiles/file/1141734920.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/91794424627.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b1bb810534---91891032077.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/xosodafozovox.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/956bb9382275b97f059c3e04aac60de0/daxagofex.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210613074536_glu0l8.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/56d62a22bde007dccc3d9258c6837a16/55061163270.pdfIn PDF document text
    • https://peterdegendt.be/file/52685737424.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/90772876036.pdfIn PDF document text
    • http://tano-cable.com/d/files/63562501074.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/470374rmlpee2q0rm9uf64kd42/zojilenimobototumunaromo.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/b5c54abbed69f5dfb07e48b22636c70e/naxuni.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf8f262c60---64506875857.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/7ab61385826ff66ee7d8d1fcd3771e7c/kovasevinolidevijapufigel.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/15311189917.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/25991684827.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/82355978196.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/35175402776.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160aff7bde7671---fuzegafonekixurawum.pdfIn PDF document text
    • http://odmooregolf.com/clients/e/e7/e7046aca88cfcc92de0be8f3f6b3de3d/File/rijevidepiseli.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/tedosejevukaxa.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e61a0b5c2---28566123042.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/d187a29b43eba6769f13634bb78261b4/fizurepesuxolumanurixekol.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/84688044863.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_off0000b8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CD 16908 bytes
SHA-256: 1c73bf44c24eb150f1562e8f83400c7cd1ff97fb5e61caeb3d85b44dce244c99
font_01_sfnt_off0000e43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 11184 bytes
SHA-256: df6ec042e5365665f2ca9f0a2974fd8d402f19d8e7c11ac87f08ae7131553fd8

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