Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42ed27425860e7b…

MALICIOUS

PDF

77.8 KB Created: 2021-09-10 14:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9c1368390726ea209346cbb583a583c4 SHA-1: e5f19f1d4ffb1c001b3e8ba28fde651a80fd5072 SHA-256: d42ed27425860e7b4a8d9622dd097e254c586c6f7d1ad81c1507bfee10674b55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of embedded URLs and the nature of the links suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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
  • 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.
  • 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://philabc.ru/uplcv?utm_term=racing+fever+mod+apk+android+1 PDF link annotation
    • https://magnettoptan.com/upload/ckfinder/files/19630286932.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/fupuxadotuzuvapilowubilox.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/29357559137.pdfIn PDF document text
    • http://venkateshservices.com/uploads/tuxameb.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/77112276917.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-09-18-57-01-69.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/15962622536.pdfIn PDF document text
    • https://asiapharma.la/files/files/fuxirosugajodo.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/taxisufosasafolimulaf.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/34818702468.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16138c76544d46---90418523974.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/nuvurunolagejaribokas.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/fosobovafonorutugo.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/32851309799.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/41046480383.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/56576828097.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa01d3b07d---dotifu.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/wikuwoberifiga.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/jifagasavu.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/45705401016.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/duwesejoguxozodorugotub.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210910_0FC943C228ABC28A.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/wuvefajugukojefa.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/bulapuxejomekepapobexelej.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///losadotejusalulun.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/7e20f721842e1c8c10104d555e686d77/10975824022.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_off0000cb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB55 17140 bytes
SHA-256: 4be7e4d08b0d94ecac544c16dd3287ffc274fff06b4908e8fbb7dd2e47a4b550
font_01_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 10908 bytes
SHA-256: 95878dabb37ec98efa4fadc222195d03d2f0e2553fd988a4a334ee9b157c3959

Open this report in the interactive analyzer, or submit your own file for analysis.