Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba26afb4a1a16c2…

MALICIOUS

PDF

71.6 KB Created: 2021-09-12 03:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0a1787832dcef2a69293b76da3662125 SHA-1: 30c0256d507ea4a0fb4fbca3eaa06883ce7618ac SHA-256: fba26afb4a1a16c248860ccdb166d2018d90736f40ab17358d38147e239972b7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=non+stop+full+movie+eng+sub PDF link annotation
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/rewat.pdfIn PDF document text
    • https://majubesar.org/contents/files/33342604915.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/93325303923.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/roded.pdfIn PDF document text
    • http://kaies.net/upfiles/file/miloregurasazuvunisazos.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/44018432909.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/vapevakuliroridede.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/janajosuzubigazogedor.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/garijejojitonu.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/xomadinotoguvuxite.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/79979425192.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/68840632251.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f41e2cfb57---zijegirazemekevobi.pdfIn PDF document text
    • http://e-hematologica.com/users/file/26966283108.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/jibejozojenomirod.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/57272608765.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/75450731993.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/71839967660.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/a9d5891ced51410856172cab964c3f2d/ketenebalubazetuzala.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdc0885f6d---pixejikilori.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/45135334002.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_off0000b59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB4 10720 bytes
SHA-256: 908a997885c12a79a5fdef9b75f471fd633b50d0a6e52683aeecdc726bc69642
font_02_sfnt_off0000e622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 16624 bytes
SHA-256: 8dd9f3c0373580b362f9653c390ac7b4e36f5145751a76736d2dc98f46aa63bf