Malicious PDF — malware analysis report

Static analysis result for SHA-256 047e7e860fd9393d…

MALICIOUS

PDF

84.5 KB Created: 2021-10-21 16:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3312a9c9060fbf961b0b3bc861d2af42 SHA-1: 4c0e660950e83e48d20418aa994220fba98365c6 SHA-256: 047e7e860fd9393defa7e310c076f45959d267e7f90e8938e46a90fa249c7e38
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maconlux.ovh/userfiles/files/sufepesesibufefox.pdf In PDF document text
    • https://casadko.fr/userfiles/file/todelipasaxesu.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/nezika.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/5676111309.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae482ecf06---64602846396.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/98841146030.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/32802164832.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/ketesabuzuf.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/kawujaxijawomizoz.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/99382097783.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/16748972073.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/pomet.pdfIn PDF document text
    • https://smilaxlabs.com/userfiles/files/30014297480.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/63793800249.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/warejivumaxadigusonikeke.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/14252488475.pdfIn PDF document text
    • https://naves.cz/res/file/buvexanibivo.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/78517885013.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/36907364686.pdfIn PDF document text
    • http://shopabrang.com/images/files/50873199453.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/5d14e1522b0e3b76ea451beeb73c7e37/supagaputex.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/59932597599.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/timawosojexexi.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/2039737782.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/zemofadugunaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/6Zflnl449io/uplcv?utm_term=cwna+guide+to+wireless+lans+3rd+edition+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_off0000e2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 11060 bytes
SHA-256: 51c1eea0398bf9c0b263e51db0e64b7b93f36d926e2c14e6359383e074ae41b1
font_02_sfnt_off00011494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11494 18348 bytes
SHA-256: 5326c2c4bba00d409d90344fc8461f5e2767fd79e56e2842bd01836b13369c52