Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea464745f5ba2fd…

MALICIOUS

PDF

96.2 KB Created: 2021-06-26 18:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ed987875f8e8bc084c8702af9a12d708 SHA-1: 0e498019c4486a9eb9f819dcdf18769867e70d6c SHA-256: bea464745f5ba2fdbe9fc7bb1ffd716ac15c5e917ff438002b069399af35018e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are hosted on disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of these link farms suggests an attempt to obscure the final malicious destination, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 https://triptoboloyfoundation.org/editorsfiles/files/wufezujajo.pdf In PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/03mda361lubugb0eeudv4g1jo5/tefatakuxoxe.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/87592827184.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/75837241121.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/41409159640.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/kagawifax.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/lasokazezase.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860ff7eb326---28443951409.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085caabeebd4---sekokegoravo.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/4c46kkiv8ihlqvg63mjpbtrt35/81414899583.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a951650b3b1---72619757761.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d714eb6b3---finulolujonofikiwup.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec614466e4---46299522752.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/fazewiz.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95df74a8f---4960331061.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/kuwonewi.pdfIn PDF document text
    • http://jarosi.hu/files/file/tujinisawobuwirikodedik.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0c4078492---93380167926.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/f8ed27b24ce84eade03d8c6c73dfa56b/22530003314.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081e1f594958---20854649169.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160922cef0ef44---61001286757.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/xiwoxikewawafofi.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8d5fb38f0---75898270670.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/50415068893.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=7+promises+of+god+with+scripturesPDF 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_off00011637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11637 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E49 17112 bytes
SHA-256: ee432a5aa60a65a17bcf24453471250d71b1b9a68cefb94d0ba5d8db4b8aab05
font_02_sfnt_off00015ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC9 10896 bytes
SHA-256: 065ccb5fcbc81ee24a38d5e0daf4048ad415e11563ca9146a030ad4c1a19138c

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