Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a8f3c811fe087a…

MALICIOUS

PDF

90.1 KB Created: 2021-07-03 20:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0fe6aa655cf8c2705dd4fab478858eaa SHA-1: 2d3e46b33287c223d3e210e1f45def74b5e95cec SHA-256: b7a8f3c811fe087a93cb0f3300e481bfa118c999d6459b1fef0dfde607ed92eb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an intent to lure users to malicious sites. The presence of these links and the nature of the hosting indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://karinameal.com/imgdish/files/nazuwakonisovijiwitimupo.pdf In PDF document text
    • https://menu2uplus.com/images/file/56331632524.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/45650620398.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/0q927t4vltoq05dk86rv0dcb21/gilizifegezo.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c1c750848---48844115340.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/038be49129d35aaf69088b17c8c0cc1e/14054354554.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/97152512721.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/99988776421.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cee1209ec27---dijinunabu.pdfIn PDF document text
    • http://goneviaggi.com/themes/userfiles//files/tovurenawo.pdfIn PDF document text
    • http://coumert.com/images/file/zoreritonu.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/e38a31530872104e12586f8372a39d63/99029902060.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/putud.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/57956783303.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a37c9dcf5e4---13313826240.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16078ffdc86941---vipirejenoduwu.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/jonipaf.pdfIn PDF document text
    • http://proxima-design.cz/files/file/kodatesinobajuboxozikov.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/085915b5f61cbfb8f6231bf46f0f58b1/molipobugukagigufus.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/3u32aqgdqs13v01use8mhhps07/34783187838.pdfIn PDF document text
    • http://cloverdiamond.com/file/58921268625.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/finumoxiwarevipuje.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/54783861758.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/ruvuwuzolukobezoku.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcf3c098a8---bepoxizip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=protection+spell+for+someone+elsePDF 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_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 10480 bytes
SHA-256: 232934778c8286fe1d2136487db9c98ffbf2d1cf653e2eaa92b7cad9daa7af0a
font_01_sfnt_off00011696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11696 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA8 17296 bytes
SHA-256: ba8f55b24f8d7b139dd3cdca4c0929fcb8cd51562a603402d5ffa50ecd6ce738

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