Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24deba2effcb297…

MALICIOUS

PDF

83.9 KB Created: 2021-09-22 10:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1b9864aeb2437a4335bbdfd20faac12b SHA-1: 9820919728524594f53c5e4747ea0ba17ef9ee64 SHA-256: e24deba2effcb29777bb1188cbdf814802fb4cc375898a8151d3f9828f398d65
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the structure and heuristics point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://tiklatakip.com/calisma2/files/uploads/91906182307.pdf In PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/fuzodatepi.pdfIn PDF document text
    • https://adproissy.emailingmanager.com/uploads/editor/file/25655405064.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/65877205698.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/susoxifuvovalu.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/najejululivanelorejuki.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/xogukekidokinuwonegebala.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zoliputizutegiv.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/silebut.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/39329074076.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/49159080678.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/larumujipitu.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/45853180398.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/44281911493.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/50882662674.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/4927695728feebf42ef3213263ce9178/ramiwifisovikibenope.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/72587839232.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132107f4f7d9---83316260463.pdfIn PDF document text
    • http://thietkewebsite.btccorp.vn/uploads/files/69970752765.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/rogakesabatifal.pdfIn PDF document text
    • https://mytshirtcreator.com/app/webroot/files/file/kekopewa.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/10450871503.pdfIn PDF document text
    • https://pastijptoto.com/contents/files/fakolofizibatopove.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=paulo+coelho+novels+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_off0000e3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFF 10596 bytes
SHA-256: d4405aa099ba86ff0e5d3f27efc7c94c0048a3fceb3c3b00bbde1c633cc71d42
font_02_sfnt_off0001142c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142C 17900 bytes
SHA-256: fee232ed087d8a23e6600dcaea58378c074991ad152a5c1219589961df806e3c