Malicious PDF — malware analysis report

Static analysis result for SHA-256 64be296570022c6f…

MALICIOUS

PDF

79.2 KB Created: 2021-08-30 01:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 010bd03372e652775d97c9ea4e1aed25 SHA-1: 1acf1eba6d56ff427d56df3b456a4d41800a2127 SHA-256: 64be296570022c6f98e90fb6b38a7de7792148b9e0f9a85e2b32943138e039b7
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. These links are likely intended to lure users into downloading further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e7572ce0c---bixukilebunobif.pdf In PDF document text
    • https://bloomeng.com/uploads/22986969152.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/71309430457.pdfIn PDF document text
    • http://dieterheich.de/images/uploads/file/wemagewopo.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161243b944a2fb---bavivulevizumovaz.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/6ba3c2f19d57718ddfcf418746d7b862/rojobubidomokamufo.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/53281193545.pdfIn PDF document text
    • http://landpas.pl/upload/file/lixale.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160effe1b4a182---wewugajapajiwe.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202108130456214962.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbb5c6a143---29219680590.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d277e75b0fa---tofodisipaf.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/liwotavedulaniwapu.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/772710ac5c92f5a9135e3bbb03c9c812/jisafelituvibepudi.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/rerugodovaxedewodofox.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846b573e96a---nuweno.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/2f92ba25bcc2c94a4b50a360a38a61cc/41676077001.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/bejedez.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/6a9hr10ad5kfcd51gref03lh0a/24966858989.pdfIn PDF document text
    • http://chromatographvials.com/d/files/godirituzidalewov.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/zesivenupaxu.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/walexuxegabi.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/49844863795.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=hollow+tips+for+9mmPDF 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_off0000d29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 17676 bytes
SHA-256: 5835dadfc4267c82d30d44bb8ff0a81e801192a871d77fd07e6e38aebd91507a
font_02_sfnt_off0001185e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185E 10368 bytes
SHA-256: 84c1c03e13f58aa47a4a2d55a7e8dcd9a85d9c66aec99dc4d5638897c349883d

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