Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8153ae63d4435d…

MALICIOUS

PDF

74.0 KB Created: 2021-09-17 07:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 44a8e082d13fbaae2c494d83bb959d9e SHA-1: 32352cf2898b96b5c2a87b980144da102814110d SHA-256: ee8153ae63d4435ddea329de841f2544b83d210b500b4583551754ca85c0679a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to potentially malicious content. The presence of external URI heuristics and the 'PDF_SEO_DISPOSABLE_LINK_FARM' rule further support this assessment.

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://e-restauracion.com/app/webroot/files/uploads/files/lajuwujodijademakopalimus.pdf In PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/mepiri.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16140de1bb1c6b---66045552032.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/fukerisomasemuxor.pdfIn PDF document text
    • http://zhihepvb.com/upload/ckimg/files/202109041001133571.pdfIn PDF document text
    • http://leruichem.com/upload/files/soripowoxinudagigijoveja.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/leziluwazajukewemutab.pdfIn PDF document text
    • http://pwharrison.com/userfiles/file/46416376877.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/tumogupebetekinovudojofo.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/10519770813.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d7096f38d---pojabevuzulam.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/97566600080.pdfIn PDF document text
    • https://fototipia.hu/files/files/papigopezedoru.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/kixopinijopiwuperevi.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/9533815847.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/vafipisapamom.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///fuwajiminizusufos.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/xigekoxuxetowatufiwaje.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/17938554781.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/3218578037.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/86709887167.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/24055375068.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1d9269493---81493584181.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/boxizut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=croods+a+new+age+gomoviesPDF 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_off0000bfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA7 10628 bytes
SHA-256: 330ce5948832bb3b3f16df550fab2a9a7124303bd3927bdb6daab5f9b15e767a
font_01_sfnt_off0000d7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 16504 bytes
SHA-256: 86f61e7784b79ddc4fe5b918be1882cc53de824352cd1e4f23cb67540c28414a

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