Malicious PDF — malware analysis report

Static analysis result for SHA-256 462b1f98e853fb64…

MALICIOUS

PDF

84.1 KB Created: 2021-07-22 21:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c15e9a0252ef7d2162ae864c8b82a767 SHA-1: ae92547826ae5b4d3abdc8ed5d284c827e860084 SHA-256: 462b1f98e853fb6406820eb6af12022045409195da086a4564fd2e88ca992ca2
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate an attempt to lure users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://doitoutdoorz.com/file/U6lK1XTxc8IKpDvH.pdf In PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/wamuxanapepi.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/4dl3ckhfq34bpe12m1scd0igvk/59823982376.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/9da8116668d0a3735fede413fc1490d9/67565074830.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/panivofokiwu.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/nenigapa.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/sasisifu.pdfIn PDF document text
    • http://vienhung.com/webroot/img/files/97840444939.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/xuwevobef.pdfIn PDF document text
    • http://askisan.com/upload/ckfinder/files/65256370155.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bffdbc1efe2---95618817548.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088708e602b1---81896721422.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/95812815565.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/9687c1b24158fa8b600665cbf644f1ab/48962801007.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/615c0d5580e3508426a50a544741fec0/fimagovutujakitupe.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/4ggatg4aot7slto399p0hs4d4j/rolejorowafa.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/001ms7397puv683lhnu1ad5ff0/lirivigagofitobe.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/dugafuzidip.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/c04vq1ppj02ekur3r8h76i7ehm/pulur.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/4466498168.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/223aa98a98a4e340e989c35e9cd514ff/puvejuxerekebidinexawo.pdfIn PDF document text
    • http://sms-dk.com/FileData/ckfinder/files/20210716_73BBCFDCD042A0B3.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=scotia+personal+bankingPDF 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_off0000e0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C8 18044 bytes
SHA-256: ae13d3c37c3ffab9beba40cb96be79b69e9f91731203efc48351b176c716695d
font_01_sfnt_off00011077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11077 10856 bytes
SHA-256: e316f27799ee5385d50d642fcd3a596f512c94912731db3fac378519a9fe061b
font_02_sfnt_off00012974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12974 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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