Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f7788da88b0435…

MALICIOUS

PDF

110.6 KB Created: 2021-07-21 00:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f2a582b7cc053c236c1ea78aa1349cf6 SHA-1: 00df3cb1b89755121324737696f7affd29da8c40 SHA-256: 70f7788da88b04354ada303cfb27e9f826bd5239826074be31fdc39421647cca
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9794

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://cottonweb.net/userfiles/file/kemujezozu.pdf In PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/e77a069678a4343a0165818b9ff3dd9c/91545803141.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/gaxavolerovaf.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/09561b4c3251e2bcb7d78f6e342b053a/vewufetomef.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/tifuzojotogidato.pdfIn PDF document text
    • http://bdn10.cz/files/file/gugugezekijakewonopexuv.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210502171406.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/nosenoduwebolokixi.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608699a8863df---serosetu.pdfIn PDF document text
    • http://longhornrings.com/clients/0/08/08da48574b41509ac7bedcf2500dc652/File/wipixokutodojimazapuke.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/7q84626rejm61ssf2kq38uutm0/muzemelotadutexilabab.pdfIn PDF document text
    • http://mldinsaat.com/image/files/guvugigekokezexex.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/43aa3972b84914688f58a9fcaf750909/buxinudigawisefebanof.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/c11f38ab8c2b3fc312d6c2a61d2ed444/daxezepitesipasamazo.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160775fb9806b1---mibugazezula.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/5fji651099ef7upv6sjhmcoqb7/mikogare.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84c83b90f0---begogik.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c869cd1bd35---guruzi.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/76012026674.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf86c7f979---54133906910.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/sidilexuzuxudom.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/2do9acpcof3b7tn70mpfg58tei/mukosojikumodimu.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecfa540749---4701448875.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/0anfedp37q0qfjarrk0iog6125/pekamefijuwugipiraxaka.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/63584183217.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/13oknfpk2cpmgmupqk5q6haoht/70402266580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=post+harvest+management+and+processing+of+fruits+and+vegetablesPDF 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_off00014e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16656 11376 bytes
SHA-256: 980b23cbdf2734a7ba781b23dfa55d36795c8871645b4f91737d2c79d00eca53
font_02_sfnt_off00018093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18093 16724 bytes
SHA-256: 57ea3a66c625610f611d2063d283d341103c7cd5035e5c8fb5e7adb80f28fa4a

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