Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5578e26023c5f08…

MALICIOUS

PDF

76.5 KB Created: 2021-09-03 06:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fe1ebc25c335da8415a9992764f29c4c SHA-1: 9834f57903488a7e2391f8b4aa33a9d2c65863f9 SHA-256: e5578e26023c5f0894be88a5365b16644ff7c3ee39721e539bc47bdd24c8d3e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for credential harvesting or malware distribution. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://mdbim.pl/ubezpiecz/obrazy/file/tewuwofo.pdf In PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/631b16637077c1fded9e46f8ff26405e/mimepefovaja.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/22021880737.pdfIn PDF document text
    • http://rentaruedas.com/files/others/diwurawukijixafadojesojuk.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/bewoju.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210602_EE1484FD82933334.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/safevuxetejemoweze.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/dewopikixirakite.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1611777dd3a2fd---kosotavitejogopege.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/97j0v0g77d59s08b9he99up3u6/jabigogipumiwaluwig.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606f609a904b4---gimiwezelawitewe.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5bcc05b890---63196171283.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021072516123370554.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/doxebum.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/52211893025.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/38236400269.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6a86eec9b---95146610979.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/a5f1d4330346132c8b12af4f9a9f1805/werafadezapowosomiva.pdfIn PDF document text
    • http://khacdautron.com/Images_upload/files/befolujevova.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/198vdlda5iroo6r6r3lmljs2ct/49571481272.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/93155962165.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/odf1iis9s9rrriheu1g6s875m2/zalevew.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608599744ba8b---95922179300.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faa3106ab18---33555257584.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=microevolution+and+macroevolution+worksheet+answersPDF 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_off0000c6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E3 10972 bytes
SHA-256: 9179edd3c4e12a77f18cd27f856a319f6932411dbc30118245b1bdf305aedd00
font_01_sfnt_off0000e033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE033 17036 bytes
SHA-256: 009c3d6aa3c255a3a843a6d22753f1989ff2b25286d3b45d2e8a54a333804285
font_02_sfnt_off00010c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1