Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6073fb47c6b8d7…

MALICIOUS

PDF

69.3 KB Created: 2021-10-03 19:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: be23981088c9b5db888c897701dc68f5 SHA-1: 9f5f22c2266290b1c9548b30c17d28992a4b83bd SHA-256: bd6073fb47c6b8d7decd1acab3ede8471601979a871802292ee1198ac78e4c67
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF is identified as an image-only document with an action trigger, typical of a phishing lure. It contains numerous links to external PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to direct users to malicious content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://eric-parnes.com/ckfinder/userfiles/files/sofuvebosiv.pdf In PDF document text
    • https://daotao.cungthieunhidanang.vn/app/webroot/upload/files/98215688757.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/rasuko.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/jefezewazazamofezapur.pdfIn PDF document text
    • https://orrizon.ru/images/file/tizuxesofu.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/pumetipafewemaroxiwogev.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/vizene.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/56494458496.pdfIn PDF document text
    • http://rrarental.org/upload/file/pazofodaxidatudewugifat.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/81930075918.pdfIn PDF document text
    • http://expnavi.com/sites/all/sites/default/files/file/11756667590.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/88220974944.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/84642907989.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/36054960772.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/26638155545.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/kekimumotiju.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/161567a301e175---monuzojob.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021092821591473499.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/22767737112.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/katunarililu.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/901dc8000c383f2f0da357a03c041593/55599140370.pdfIn PDF document text
    • http://dentherapia.hu/files/file/27570458429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=elementary+principles+of+chemical+processes+3rd+edition+pdfPDF 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_off0000b0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E4 14448 bytes
SHA-256: 6ebbaec5a9e71ca0ff8b73877ee95ce50831ef25fea5e7f8ba65b2ec152c5498
font_02_sfnt_off0000ed21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED21 11156 bytes
SHA-256: 2836725d39957cb0cd81d3b05520b8c6853684976f23aa94c66c447a32a7b70e