Malicious PDF — malware analysis report

Static analysis result for SHA-256 edfeaca0e1a296bf…

MALICIOUS

PDF

73.0 KB Created: 2021-09-04 01:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 83acc3a01701d2fead81c659c20f1c86 SHA-1: 3b26a62f1ccdd774015672bbbccb824b965fdb08 SHA-256: edfeaca0e1a296bf87a73a28ea1d28bce090fbfdaedb9d9ef93c0700407ee8ce
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 phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised WordPress sites. The primary purpose appears to be directing users to potentially malicious content or further stages of an attack through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ada9dd754---80373837472.pdf In PDF document text
    • http://schokoladenfontaene.de/idata/pikenosu.pdfIn PDF document text
    • http://intersonik.eu/upload/files/xusovokenedi.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/5f8384579ede6765b9e496416c0a8a5b/netudobidosejititifi.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/xenejaxu.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/2a28a1a3a2d9b7421f92bc758e3ce4c8/tebejumepepukoxax.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/gotoligixeduni.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c65e5cb78d---gifikosuranulolopin.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/nabovanamalubumugogijese.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610877dd05060---wedesigosude.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/gigodotujagemevul.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/48379778362.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/63731781650.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/widezaduxowubebam.pdfIn PDF document text
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/rozadexo.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/77547510433.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/negop.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a22f330d0d7---gofejefumotalajot.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/dilujumimipeturozozeno.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/47dn96egtchu0tpl8030fijsu3/xusitisa.pdfIn PDF document text
    • https://dpengineerindia.com/admin/userfiles/file/51712962917.pdfIn PDF document text
    • https://epiphanych.com/images/file/37349978110.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5a103e7944---difuvaromipije.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/5c6e7db4fc444de26138ed1fb9ed26b4/58200154239.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=nasm+essentials+of+corrective+exercise+training+free+pdfPDF 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_off0000bacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACB 11108 bytes
SHA-256: 713b3db4f18fd38bab854184366add0d9d64a6a38072070d3aa8be8e6e72f045
font_01_sfnt_off0000d484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD484 15960 bytes
SHA-256: ca3315c7d1518df85e39f056250939b9aeac3c1c8d788bf7ab5ac4fdf782c00f
font_02_sfnt_off0000fd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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