Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6f4a8f042bee30…

MALICIOUS

PDF

89.7 KB Created: 2021-06-30 08:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8115d524e4dc29e353555a54e46177ff SHA-1: c4c7b65ca12e644ac8b5ff681ed33c93dbe5b285 SHA-256: 0d6f4a8f042bee30ee28a4704e6be215384ff2b78d01d148469e609970cbea08
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The document body is heavily obfuscated, but the presence of multiple links suggests an attempt to redirect users to potentially harmful content or for SEO manipulation. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 5

  • 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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/4c2ab1e0dd855927e99ccfe331c17c34/jusajubasivipumujado.pdf In PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/6403f9a856aaf9f64ce2ab03645b694f/4621322081.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606dff45d442d---36249347549.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/xemewamekubapivirisumozeg.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/rurewikav.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c39ffb73d9---5633515099.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ichgdcqho7dsr82rdci6c1jvt0/bifefexurekikusonut.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/71964706770.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098ba42b9bb8---busesine.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/ejk1teo31apjsodm2p4t2oebf5/xemegopidufader.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/vomelojadinifuketatosaza.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfb94b8e81---10005444513.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/3132893c1e21c86b522c2553a58080db/748902555.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/81499371739.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/83823031380.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607943c9c0160---19492269022.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d05a2dd59d8---70498563289.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a86f41488---xumikurowipe.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/80472933727.pdfIn PDF document text
    • http://ahchala.com/img/file/sapefedika.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/a598a6360871adba5bd7227d8b28f16f/labiji.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607514609fde2---2950576747.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/bd1b6b7caced47f30da08929dbd71033/xirakorefaje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=d%26d+christmas+stockingPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8
font_01_sfnt_off0001024e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 3196 bytes
SHA-256: c365c97f28e26f41662efa18ed72e7867dfb039fb298dada68afa7005bc71be3
font_02_sfnt_off00010f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5D 19140 bytes
SHA-256: 2c310553d1e5bd458d6de365637c70b6f0f50d7fd3f978b0e113df5cebe49cae
font_03_sfnt_off00013ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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