Malicious PDF — malware analysis report

Static analysis result for SHA-256 7993e3d7863e4c8b…

MALICIOUS

PDF

71.7 KB Created: 2021-09-05 03:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d8562e62ae94f0fb98774c7c95d94e8a SHA-1: a4eb365322ebc3fa6016ef160e09b32fdf450fb8 SHA-256: 7993e3d7863e4c8b8dc4cfa8db75ef368b6cedfaaa2bafafbd26d20fdf994b3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised CMS uploads, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/dum0gjn5p1bj3trgakt5em58fo/46497959960.pdf In PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/01cc55b84c794ffdcd1f270a58f1585d/funusasexivored.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/nejijo.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/182abce8d1b8e4a1fbd2da88501fb70b/sakinepi.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/77852631868.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/93721952252.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1611a322739c22---34969809130.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/muxixewi.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/89019594911.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/matosiwojelit.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a62f26cb17f---niwidovizopujezimosatev.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/solufupapogadinarada.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/wafad.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/32196871703.pdfIn PDF document text
    • http://1careglobal.com/upload/files/98311381209.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/jebigesixagusolijokogaw.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/jn7hag70cempb1pf9n0hj3d1uq/pebobodedonojeviviriraw.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/sesibog.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/25213851675.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/1004974244.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/fafulip.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/wivazapokarogapabirunuf.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5f4nkfeli1l41u5id9q2o19udd/detudabajamawo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=les+types+d%27accouplement+mecanique+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_off0000b576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB576 11032 bytes
SHA-256: ba6d02a0752a63315e4c229153ea9c9353254dfbdd0a647d2ca0b5443b0bc5ff
font_01_sfnt_off0000cef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF2 16836 bytes
SHA-256: 28e534bdbfdfad0d71d97c2b5706c2c56b348e9d2e9e1ec8b278709e510c82ba
font_02_sfnt_off0000f930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF930 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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