Malicious PDF — malware analysis report

Static analysis result for SHA-256 1185dc4b06177599…

MALICIOUS

PDF

80.7 KB Created: 2021-09-21 02:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b3daecade815bbbb56e0ed3b112dbdee SHA-1: 48bc0b8d5ae22174be15127610be7de079f08bd7 SHA-256: 1185dc4b06177599eee2ad67c93b0c0d0c44e897eb5156b4f62c236817b56921
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or redirection scheme. The embedded URLs, while numerous, do not appear to directly host executable payloads but rather serve as part of the redirection infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://willes-gb.com/uploads/files/202109090702422613.pdf In PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/s48n1u424b2nlc578lltvpubhb/96147928267.pdfIn PDF document text
    • http://villaroyalenews.com/userimages/rirumebudebovusugurerab.pdfIn PDF document text
    • http://orvositudasbazis.eu/images/upload/file/satut.pdfIn PDF document text
    • https://o-dance.com/upload/files/jesodivilojitiv.pdfIn PDF document text
    • http://a2hgghk.handylover.com/upload/files/kajosamawox.pdfIn PDF document text
    • http://jsdarvin.com/files/durimegodefo.pdfIn PDF document text
    • https://ms2oke.com/contents/files/99551301987.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/32315627385.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/59489964447.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/bumimetarobo.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/6180d1d52228203abf1d8f1d131b755b/bubobalix.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/71839666002.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/mofugizis.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/mofozinobemuxapatigamuguz.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/dudulidovuvomevowen.pdfIn PDF document text
    • https://seas2010.cienciaevida.pt/site/upload/file/vojupemorogepudesutir.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/19711338613.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/165b66c28bf4460b2ca1633a14c4263d/81808029198.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/21973274209.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/81039891388.pdfIn PDF document text
    • http://www.flamanville-76.fr/upload/file/47083304786.pdfIn PDF document text
    • https://geya99.com/ckfinder/userfiles/files/bezexiwikajadizi.pdfIn PDF document text
    • http://isleford.com/filespath/files/20210904200003.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362edbbc99e---19768288427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+install+kali+linux+on+android+without+root+2021PDF 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_off0000d385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD385 18572 bytes
SHA-256: a15cf208ea24746f036a70f91e373ee813894fd6a8a80fa0153e08328ba1d188
font_01_sfnt_off000103be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD5 10880 bytes
SHA-256: 99a75973b12a13c7265d067735246d666abcd56b4f909dba066968e94a30bbb2

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