Malicious PDF — malware analysis report

Static analysis result for SHA-256 032ff36151b2a28b…

MALICIOUS

PDF

75.9 KB Created: 2021-10-07 09:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 779ff8d69c02f31138c688f4c5bfd0bf SHA-1: 069cd249a1b307ed67df3fc3f57fa0e47817a7e5 SHA-256: 032ff36151b2a28b99d48b6cd9e761fc5f1f75a61c7c06ce5f9c3735186f2346
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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 http://grandviewgroupresort.com/upload/files/pamelumegerilinatosojuv.pdf In PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/farilugobisenedamesujuz.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/37328440787.pdfIn PDF document text
    • http://crediramasrl.it/public/file/lowenuwotupojesuvota.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/dupidilexeriju.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5b63d249a---femavedokenifabifizumi.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/pujifuvitaduxixerafus.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/nabafapijisaw.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/59404130894.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1a2ab7974---piredozokuk.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/92462814686.pdfIn PDF document text
    • https://cityface.cz/res/file/simuzidibuzilemixebo.pdfIn PDF document text
    • http://hpcad.pl/Upload/file/82420891403.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/gogogof.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/fepujomibesuvolamebirop.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/8829548156.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/28977352739.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/vigaradepofapiromudez.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/51643507791.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/59699911857.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/76022961564.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/9108789975.pdfIn PDF document text
    • http://recepti.plovdivweek.com/js/ckfinder/userfiles/files/1186544063.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/tigaliranijoxiduzudotati.pdfIn PDF document text
    • https://nichebearing.leaddeehub.com/userfiles/files/zobupapu.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/88769954277.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/dipisalopatar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=sadieville+ky+apartmentsPDF 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_off0000c23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23F 10780 bytes
SHA-256: a756077ec902f55e4dcbf10fec3c05a29ff4ae92acd790bfa7fc489c3bc9f1ee
font_01_sfnt_off0000db07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF319 17972 bytes
SHA-256: 39d4496b844ac1209c1a6fbed0c1e13e26bd8c81cca9a42b8980def4446cbe2c