Malicious PDF — malware analysis report

Static analysis result for SHA-256 b458cc47688fc6db…

MALICIOUS

PDF

89.6 KB Created: 2021-07-07 05:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9567811338d2912e872d1547eabee589 SHA-1: 30a4c38aa8a284f095a50502ae2153e1494d65f3 SHA-256: b458cc47688fc6db3eb4b5dbaeb44c6a4be7ec3e23601ddb7d6b65ecdff18d54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2e38929f4---wogexezoxov.pdf In PDF document text
    • http://terezmisszio.eu/files/file/36913233467.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/cfd38288c932884307d2897a0c7907cc/botakojikov.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/727eaa7fa9697443a6e35153e05fbf2c/wezivuperobanobab.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/gosujuva.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/fewisa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e92e00e58---49973770655.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6373ba9435---topalabe.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15ddfe799b---dumotorobexibeximuzose.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/35682173995.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/33848484310.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/siparivaxikusasedijokixex.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/d8184aab86ff080aed7595c4a0b78c8a/43312458683.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767aeb0fb6d---29627074432.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e40370dad38---nisitakowobutujevosopij.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/jojexovejulupagawivelu.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/hk6la0gh52g71g9hc2g4jl8lc1/retuba.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/33431145546.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/95234322676.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/03c651f65b08cbef03a22ad83cb353f5/rogifokojunumigilobog.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/ranogozexe.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/83536191518.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/safabosifetukevetixik.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac62f590d6c---89414452863.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=master+builder+contract+pdfPDF 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_off0000f894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 18120 bytes
SHA-256: 3694fbf3dd334fa7079fc0929d44712764e1a5d4d58107574d119886368446a1
font_01_sfnt_off0001283f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14056 10848 bytes
SHA-256: 81bf4e62da4679741c3f033e81bd32b0cfb78f734fd2ff777d9b1e99241c4546

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