Malicious PDF — malware analysis report

Static analysis result for SHA-256 062e756bfd15632b…

MALICIOUS

PDF

68.5 KB Created: 2021-09-25 00:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2b22f5b931662f6b36cda69495b596ac SHA-1: 25acdad52983226d0c758333e3756b588e205593 SHA-256: 062e756bfd15632bf75afee617782233019c141e612bff5cc1053e060a086e36
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JS points to T1059.007, and the overall nature of the file as a potential lure suggests T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://laborke.ru/uplcv?utm_term=b+movies+free PDF link annotation
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/4288312034.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f312ef372f---pudalusukodezidedofu.pdfIn PDF document text
    • https://el-tall.pl/pics/file/22399353090.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/40053030578.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/puloweturopamipu.pdfIn PDF document text
    • https://jdconstinc.com/ckfinder/userfiles/files/gitonejefilelono.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/babelixeborazama.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/faluxigitofojanotumop.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/legujurukegibuwibo.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210902054518590.pdfIn PDF document text
    • https://adurucui.com/ckfinder/files/tasavopudagefuvama.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/7779548676.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/nowevazikuzimifevu.pdfIn PDF document text
    • http://caerulumpharma.com/upload/files/67766651687.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/nevixefotezilo.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/31210366774.pdfIn PDF document text
    • http://avtosfera28.ru/userfiles/file/24066745965.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/neruvubotiz.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/11224786096.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/98723912717.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/10554999120.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/27820010203.pdfIn PDF document text
    • http://contextuae.com/resimler/files/43056505495.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/kusufe.pdfIn PDF document text
    • http://tencanpowder.com/d/files/naxazoxogukafifozaro.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/tesojujajusovesasimafuxax.pdfIn PDF document text
    • 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_off0000b1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B7 10084 bytes
SHA-256: aede02f43f084e50af0eb16d5eb05d83659c73b9af03ff25be7e83acc0406670
font_01_sfnt_off0000c837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC837 14720 bytes
SHA-256: c00df3a56b159792792e41a71df57df70cbacac8568eb1d062fb34e4ee84c5a0
font_02_sfnt_off0000ed02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1