Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bf4bdcf652eadc…

MALICIOUS

PDF

77.5 KB Created: 2021-09-07 13:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c73eb13ef9d16de395d9ffb78a40bbe6 SHA-1: 94028ef006eaea32a0c3a9b2b3705c05dd3c27e9 SHA-256: 46bf4bdcf652eadcba4c27d387e5f26ee6fa5a9c0a099e61b40bee8181b23889
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. These URLs are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://medvor.ru/uplcv?utm_term=blending+segmenting+words+worksheets PDF link annotation
    • http://baltyk.recykling-rejs.pl/imgturysta/files/ralosadidutet.pdfIn PDF document text
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/22808489121.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/ms5jo2b8bqiq0vfmam107t7a50/livigopugatedenomekized.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/21509946258.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f29f179d2e2---xesagu.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bafaka.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/jasusep.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/16749815540.pdfIn PDF document text
    • https://arerp.kr/data/file///42887511961.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/59994656287.pdfIn PDF document text
    • http://dd-eng.com/files/files/xafumusiderowifi.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/1711004085.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/5668326947.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5acc765f04---finemimi.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4d096e07c---wisabarumej.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/kj31212sk8scf0sh3ta8f6nu46/wigalotifutiga.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/2753e4a1675a2c251cb311599d32d87d/wunaratomediduxuwugivid.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/puxosegen.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef1c3c93b8---59551685308.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/mlu3h268a23964p6lh7lia0nij/zexofoxananivomojavo.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/vusarisonebuxuli.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f357e3370---74997679357.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/silodixolijexekixig.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/fabuvegakasoketutafu.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_off0000c7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AD 18744 bytes
SHA-256: f13114a8a1df06bd06e7a8ecd9bf39c7af5baad51b37440a68a280d704eb3d51
font_01_sfnt_off0000f7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD3 10764 bytes
SHA-256: 5504e23b6f6433e4968c8559054d305c84c8a2e7e9074f796b6534f2b53649e7

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