Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe30ab9e5b0bbf7f…

MALICIOUS

PDF

88.3 KB Created: 2021-09-03 12:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d0a2f47d5fc2abe91321911d6e4076d6 SHA-1: 9613892ec0edcdee6ddb4e1f98dff606b5fd1a7b SHA-256: fe30ab9e5b0bbf7f0c4da4a616d3578665999dde5d78b4fed9ad91195b15c621
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress sites, which in turn host other PDF files. The presence of multiple PDF files and the use of link farms suggest a phishing or malware distribution campaign. No scripts were extracted, but the PDF structure itself is being leveraged for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://yokohama-model.com/userfiles/files/38740241538.pdf In PDF document text
    • http://www.emailposte.com/pictures/kokebomigubovibulepod.pdfIn PDF document text
    • http://airsoft1.ro/files/file/kenosemisogesemuribo.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c9b1c2ed9---39172219683.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1b547d7b7---87709158332.pdfIn PDF document text
    • https://wagaskar.com/media/zoviteno.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/43606208193.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612444e5f1bea---39645064051.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f785e285b2e---67872350913.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/tufadijisipudubeduj.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607445a7e7282---76077035648.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/48891626394.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/kerujirexezo.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/89fbb4e8c4ffab86d0dca3d7b575bed1/90400262544.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/getazabolirefig.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/42745694061.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/0b6bfdc67600c68aff245f141e5ccc16/37955354000.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/vbhrfvtaho9sijt5ecpnda0fvm/farulifoxipuxuz.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/ledavufezinonamopuvujaxov.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/jebodazofarox.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/44632884072.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/36801356827.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/ed5f10497297b1d4086f81cf15f0c403/33841710147.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/56608970003.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7cf2156f9---pilenuwejilotugedukol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=mta+database+fundamentals+study+guide+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_off0000f0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 18472 bytes
SHA-256: 495bd1192eb3bd06648abcfe1a5f9303ab4ca23127a78cba103a0d94220a50b0
font_02_sfnt_off000139a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A9 10968 bytes
SHA-256: 71a226df013a97537fc67ce1a5ea15df0236c0a9c1ee76757e6d8349f3dccf00

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