Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b086414d49a5f75…

MALICIOUS

PDF

79.7 KB Created: 2021-09-22 09:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e1867e8a87263150a79c8d73e2156a29 SHA-1: 7982777540dbd9d1c07595e8e43e767a0ca0b3b5 SHA-256: 0b086414d49a5f75046b80f91d9e82b22bf80366c0f5f6f9be7769414a8f4ef4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://catamma.ru/uplcv?utm_term=sword+art+online+alicization+war+of+underworld+season+2+episode+1+dub PDF link annotation
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325f63acf59---wifakarokimadar.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/11130864523.pdfIn PDF document text
    • http://minerva-collection.net/files/files/91501399838.pdfIn PDF document text
    • http://quaint-house.com/images/blog/file/lojofedisifenebekefi.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/puzibimo.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/9c6cd48674b7cf27f04a892ad256911d/kutomidevukuxatir.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/90488481760.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7960bd5ad---ziwaxe.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fda330e9a4---kanorusowigezo.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/vamumutenanunuxipe.pdfIn PDF document text
    • https://kentacademymiango.com/userfiles/file/44199193191.pdfIn PDF document text
    • http://cl-pub.com/files/files/95971604156.pdfIn PDF document text
    • http://bamila.vn/luutru/files/wikag.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/kajoxudir.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/dejigenunanuma.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/jijujurenarizurif.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/lojadisaxokepezegedidup.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614348935d92e---madiramodojafigut.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140da4484801---nejonunagevifa.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/37552482907.pdfIn PDF document text
    • https://laser123.com/geektic/files/sazopolesimedi.pdfIn PDF document text
    • http://kliknetezde.cz/admin/obrazky/file/gaporizumudozaso.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/49775913396.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_off0000cfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA9 17960 bytes
SHA-256: e3be543a856ad35035e50570972cbc88e1ac7d5b3030d10827b3b91072cb5903
font_01_sfnt_off0000fe72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11689 11248 bytes
SHA-256: e9754b17491393b0f942df26ca9c5abdbbeeaab95dfea5f606b88a6c7ae98efc

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