Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc05be3f5a323a5…

MALICIOUS

PDF

86.0 KB Created: 2021-09-06 16:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 94c2a6413318f702bb6311c123f83558 SHA-1: 848b8b5734930ef6baffc15132dfcbeccd07611a SHA-256: bfc05be3f5a323a5163463819b9e3daa2886087606b091e0c0ea3a4a8f6d0720
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of external URIs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://garglob.ru/uplcv?utm_term=2007+volvo+s60r+manual PDF link annotation
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845a3a214c3---fepap.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210622224824_8wetx5.pdfIn PDF document text
    • https://digireg.it/upload/77719891567.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/93433865168.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/80396051391.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/xadudi.pdfIn PDF document text
    • http://yongqingtech.com/d/files/86876076983.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/bedufobami.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c3768562c---1155029.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/wasiparupuliwozetiponu.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210905055227.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/54600029205.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/pelisonobun.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/zodero.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/00b5f02e637571740006d74188bb3117/jerigeganin.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/bizonozakiper.pdfIn PDF document text
    • https://hawkseyetravels.com/assets/ckfinder/userfiles/files/doliwozuwaf.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16107f7185c1fa---tefafodemesixi.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/salotusumamuwijorex.pdfIn PDF document text
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/78521803204.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/49149368392.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_off0000e9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 10476 bytes
SHA-256: 66c33161da98f49f627e7e76e9450efd0fb6cee52d60a8e9209b5f0b20410919
font_01_sfnt_off000101c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 18440 bytes
SHA-256: e98339043204ed798c908d027fb792701100f8cd407136ec1ede7f39722a1801
font_02_sfnt_off00013254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13254 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1