Malicious PDF — malware analysis report

Static analysis result for SHA-256 700ba7295e5a1264…

MALICIOUS

PDF

83.3 KB Created: 2021-09-16 14:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 96bf000e060887a2df65890dc1f875be SHA-1: 0b881494c70e52df6154458fad5efa5da586b0ca SHA-256: 700ba7295e5a12645d9f9b991982efa3cb67f9cc35c61675a08be589bc5277e0
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious intent, including random URLs and a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://jagatjyotischool.org/jagatjyotischool/userfiles/file/795414854.pdf In PDF document text
    • http://frankifoto.com/uploads/pages/files/30333106903.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/vatogidola.pdfIn PDF document text
    • https://semut73.com/contents/files/vudukorezajatifa.pdfIn PDF document text
    • https://regenerateacademy.com/file/sifufekudimorimaladag.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/41698886343.pdfIn PDF document text
    • http://e-hematologica.pl/users/file/guwusezasofuwizaganagevap.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/67380371929.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/woxuzi.pdfIn PDF document text
    • https://ecoquimica.cl/dinamicos/uploads/file/36947310655.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/sixogilojizizaxuxo.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/felulugid.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/69299438337.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/pikemipevijemutunika.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/jamiwojokusudivolixamove.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/66834097909.pdfIn PDF document text
    • http://selmanoglusigorta.com/userfiles/file/30295136416.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/57205947638.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/h3f07n5ctd2arglhm7ac5bn8u0/22552625573.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/95633117999.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/77433820793.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/75642579952.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/78980630730.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/venoxaveg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=app+to+watch+football+live+androidPDF 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_off0000e11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 10820 bytes
SHA-256: 34900be7eb2097059b8412c5e60dde6c3ea916eacf9b162c55ff69d5c1ea337c
font_01_sfnt_off0000f9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DC 17968 bytes
SHA-256: ed67bc8d8198c826ec1f97de2d2cf096a4eb89138f7586bcab6c58d4daf2f9c6
font_02_sfnt_off000127c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1