Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad7caf9998f3942…

MALICIOUS

PDF

91.1 KB Created: 2021-09-03 20:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c2d9e49fc17349c683294250300cd88e SHA-1: c3ab586d963801df6a61226df0593f04dd9a8165 SHA-256: cad7caf9998f394205e76d6219768ff69b25ae58ef60eccfe0c95a54e7b308ae
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs and the nature of the links suggest the document is designed to trick users into downloading further malicious content, likely a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://lucidareemantenerepavimentifaidate.it/userfiles/files/finorowerezevasotawug.pdf In PDF document text
    • http://comp-art.ru/userfiles/file/50890136527.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/68355291353.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/89182638999.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/78873009170.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090d71fd0165---3903486080.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/8972116850.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/memadegilabosinas.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/11225374538.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/51621213068.pdfIn PDF document text
    • http://sanmargholidays.com/ckfinder/userfiles/files/taninamuwakoj.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97cd32c61b---48460342177.pdfIn PDF document text
    • https://emmaushuis.org/pages/luzuxexosupusojezako.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/81375974984.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4954101bc---xegazizidazuwinoje.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/45f7a6ff2792ed4af66c52062e36e280/degadom.pdfIn PDF document text
    • https://equinox-e.com/upload/files/gizabimosoxerurik.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/0uq4sfuepp7pnorggi8518qfno/giwuzorijeforufadaweba.pdfIn PDF document text
    • http://jaatkinson.com/userimages/degojatuzadivenubax.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/ba1e76d2147f16a242ebdec41d6a3e2b/fegogubom.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2sp576jb67o1fpo50p5se403g2/14894245635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=comment+installer+lspdfr+gta+5+pc+2019PDF 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_off0000fb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB93 18540 bytes
SHA-256: 995bb0a274b2d07f54f2c5d4c759535bff3fed8f815ced7cc154ee3b8c1baff9
font_01_sfnt_off00012bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000143dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DD 11588 bytes
SHA-256: 0780ddaea697b57f037ac908d36cd26b7278ed1f5ee9d4adc1b40fd1d383ed35

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