Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0acf9c7264a4c7…

MALICIOUS

PDF

72.8 KB Created: 2021-06-27 21:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c2ffd5cd4dce8e0410baf3e2cce1f96b SHA-1: 0f8123c3a581dc2aa8215adc48ec838f37dffbcb SHA-256: ea0acf9c7264a4c744e0bde438c75855ea1ea2a9c65cd516d67455aef2253a46
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of multiple links and the use of 'utm_term' parameters in some URLs indicate an attempt to direct users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://smidgel.ru/uplcv?utm_term=2019+accounting+exam+answers PDF link annotation
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/o4um9d4cld25n8hn4hlj766jd4/23656064714.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16099cfb02007c---lolujigotivekizokawimufud.pdfIn PDF document text
    • https://isosklo.cz./uploads/wogumalawinunisamesobax.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/lovopufaposejabopuloganol.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/2d2c47c92b21abf0c6284654538a7e5d/teveta.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/20073556815.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcccceae51---jebokokodaradive.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073802555b5f---suvosimewixulub.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/27249359076.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160956add7749d---karasaxof.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/jejigedugelejuta.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/5d9f0bc9da089e635993e05368953586/govibov.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/a5ec2580a4ccf57acb76ee5a4d9387a0/7019571438.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/gijev.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/69752644449.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/771f3e909689c5debaee5d338828f073/2569790469.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fac0f2a92---dodewedidale.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d2ccafa5---42008969223.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/246caf873bfcb7e3440bfd45b2c296f1/nobimu.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/55231992763.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bd56c88580f---32845290509.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b434be6be---pubomolov.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/49872a5efb482c65cc66d2da872b0c42/46413423191.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_off0000bb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8B 15572 bytes
SHA-256: 885a9c1db4419842194330bd62d769f1354e74bda61b5962ce4cf324dad49683
font_01_sfnt_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 11180 bytes
SHA-256: 9f1c90d01ca25504a6d8186f15dbbd1b58cba8903f1f31b0e000a5d57911f247

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