Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e0c84aeca9d4f7…

MALICIOUS

PDF

92.2 KB Created: 2021-08-10 17:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 2abf538521ef787368dceda49667e155 SHA-1: 08b249c667f215fec7c775c8fcd4e854f38560b2 SHA-256: 64e0c84aeca9d4f7119753d34f13a9f6d855eea68042646075cd7d84bfb39820
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farms points towards a tactic of directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://rafaelstore.ru/upload/files/rewuxozejilagare.pdf In PDF document text
    • http://vetcarefoundation.org/userfiles/file/mimuwemejafajurem.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160902bba016eb---67114695057.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/tirerofiguximamojiko.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3bd1b3f31---xixafesaxowad.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099dbc930ae0---xeduxavazusixod.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/2a2e8e0808eef0de1ccd6a68f243664e/24161285757.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/dogebagilidipufaziliruj.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/fumatovibawalikiguwog.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/77176522969.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/52483450109.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160757498272b7---86865917851.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d4865b2c57544b59f1d1eead49954a29/xipomedirunopexuzubure.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/pefijusojewasavasidabux.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609045f1b31ae---segoba.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/uflhn4t77puv6qn8t9kt51emi4/1981618233.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/rbn89qjnp83bdkm1gnlnl3cea4/tunorexijatuxomujakal.pdfIn PDF document text
    • https://ivanamihic.com//files/68491926746.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/23732496327.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/757107e3b7a124d91b05b6c9deab6cf9/vetatofizikugikuv.pdfIn PDF document text
    • http://lg-palette.com/upload/files/67122000031.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/ed3115118c1ae08bb2985d95e4e69137/tabalozadu.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/laxubewezajuborakutiku.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/25504043562.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/594gaf49jsppjklhir7eabe49f/tubanapapegowuxetuxazof.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/78098299027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=gta+san+andreas+hileleri+g%C3%B6rev+ge%C3%A7me+hilesiPDF 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_off0000fef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF1 19672 bytes
SHA-256: e2871bafcda9469b91db6ae1f4044e9b78c6777f9a676bea5d21ffd8d57e6e21
font_01_sfnt_off00012f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0C 11092 bytes
SHA-256: 37a59113569197b019d15a211cb48f10a5d560dc9d95c8068d42111356770867
font_02_sfnt_off00014874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14874 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1