Malicious PDF — malware analysis report

Static analysis result for SHA-256 69afc808e3f4085e…

MALICIOUS

PDF

86.0 KB Created: 2021-09-09 03:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 08f3a336db19cfedc3b1f13f0419efde SHA-1: bf7416ca843f8d36fb2ca3b9e6f8db75309a4cd6 SHA-256: 69afc808e3f4085ef98f9707472e49ce0b39c9a139307e0ad65b5b90ebe6b22a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external links, many pointing to potentially disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it may exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://aljazeerahdrilling.com/userfiles/files/ralaxib.pdf In PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/37928963045.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/02/76452242946.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/65559477358.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/kesifozawuxes.pdfIn PDF document text
    • http://www.pratikchoudhury.com/fckimages/file/vanilowonelik.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/93096566018.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/64596614067.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/6405913539.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/jixewimogiluronu.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/6597150695.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/57940422837.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/71542688029.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/jegusisej.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/xenelasidetimis.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/53181348846.pdfIn PDF document text
    • https://tigaintan.com/contents/files/fomuxirafaradivuxibega.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/xidozisoji.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/tewametuzosuwiteke.pdfIn PDF document text
    • http://maysoi.com/hinhanh_fckeditor/file/54391327289.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/17427091352.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/fubanulu.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16132ae8d7bac0---kazewanowitedanaxeniwesu.pdfIn PDF document text
    • https://ekransamara.ru/files/zelavediredebopokemav.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/19358977054.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/96594621076.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=android+cast+screen+to+tv+without+chromecastPDF 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_off0000eb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10328 10824 bytes
SHA-256: eea42c8e389c0be3118a691aaa7619cc48c74b0eb1d4ce785ab8666e1afcbade
font_02_sfnt_off00011c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C06 17608 bytes
SHA-256: 686bbe8fde9dce89f6ab92c406eb5eef283477b0d0e948b580e34459035f08c0