Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6ff38058d26880…

MALICIOUS

PDF

81.3 KB Created: 2021-09-11 06:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3cd880f8dcad902462fcb310bbc282cf SHA-1: 778bbe342de70ec731f99093610b858e5314505b SHA-256: 6e6ff38058d2688039a5e22902eaeb596601b58310f69fb5c9e29dee502bbd59
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of links to disposable hosts, suggesting a phishing or malware distribution scheme. ClamAV detection further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://izeninfo.net/admin/upload/files/tiritalikebinogofetunolab.pdf In PDF document text
    • https://implant-drill.com/userfiles/file/41964455528.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/muzudafimovujoxukulejawi.pdfIn PDF document text
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/52493558086.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e816f208a---mamara.pdfIn PDF document text
    • http://derp74.fooden.com/UserFiles/files/81517180683.pdfIn PDF document text
    • http://whdhgs.com/uploads/file/20210907202148285.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/rekupipa.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/76193531978.pdfIn PDF document text
    • https://www.confirmedtour.com/files/vewilafifowa.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/jugeg.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/12971939100.pdfIn PDF document text
    • http://sintniklaas.kinderopvangpimpeloentje.be/ckfinder/userfiles/files/bagigifevifeserupub.pdfIn PDF document text
    • http://fishingas.com/userfiles/file/5273687875.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4a1e52029---99899431149.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/76379988795.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/ledejamarigijeno.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/11945156621.pdfIn PDF document text
    • http://china-guolin.com/filespath/files/20210902021337.pdfIn PDF document text
    • https://losaltos.com/wysiwygfiles/file/44766637569.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/81358106000.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613154c6788a1---59321108720.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-09-11/images/files/xaxabudimo.pdfIn PDF document text
    • https://eslms.com/userfiles/file/69352756389.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/rejitowuwawa.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/45296039886.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=what+is+data+warning+on+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_off0000da2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2E 17760 bytes
SHA-256: 09a0a8a7754a334ae85134a93b05531ff85668548c560a310efca5b83280a7e1
font_01_sfnt_off000107b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B2 10428 bytes
SHA-256: c26193b43440c5a6f99f890e0c622af55471590d20528179b415ff4b0f7090ac
font_02_sfnt_off00011f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1