Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b48e114bc718d7…

MALICIOUS

PDF

88.4 KB Created: 2021-08-28 20:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2fedeaf810960605118fddc89e63287e SHA-1: b431b6d8f0ac9be382333360bae1048a25b4a423 SHA-256: b8b48e114bc718d77919ac646e3b5315709d1e2ce0070ebf2831bbfadcc4da58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting sites. These links likely lead to further malicious content or phishing attempts, indicating a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/2b2b8f429dcabbce2be6a737c3d67e65/poturaperutapezesuvagak.pdf In PDF document text
    • http://pressvaluation.net/userfiles/file/89783948812.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fovimurodewovidopozu.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/89450026419.pdfIn PDF document text
    • https://gkatsov.com/userfiles/file/12571116717.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/73170683908.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/kodufijudujizawanujan.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6423a3744---nazizugobupajugujolowezit.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/73849611628.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/de68eca865909131d35a123c5ead11bd/67733529927.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a734d77eca6---36439576342.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe685e79de---rogefuwamujijuwad.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/falabelokazuwakotiwiw.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/10d13146950e31abab66c57dad5b75c7/94195644578.pdfIn PDF document text
    • https://inncredel.com/uploads/37515090326.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/woweso.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/rubozun.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/ee6408fd90f82a0f89d929a3f13ffdfe/wizikezowisipirojajuka.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/vajumusiruletitukujefeder.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/zukopetejekofo.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a7a6d872---91153824392.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/2475463842.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/89033459369.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+story+bookPDF 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_off0000f54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54F 10112 bytes
SHA-256: 25424d6890fb3f446337a499545645a6a60a36062d46e46a573864359cae8e90
font_01_sfnt_off00010c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C18 18272 bytes
SHA-256: 5c6eec56d3d4ed2c83d84280d607ff8687d9358e46754ec4bdf5f6c4de21330d
font_02_sfnt_off00013bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.