Malicious PDF — malware analysis report

Static analysis result for SHA-256 edaae779ec8fc9b0…

MALICIOUS

PDF

92.8 KB Created: 2021-08-03 18:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: e415102f4db4c15c6db02fee8ca43cfe SHA-1: cf52c74b1e16f49a8188eeb880d77c3a626b2ea3 SHA-256: edaae779ec8fc9b02d3d716b443cdf13d2057eabb2a255a4550852a2ec70efb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. The presence of these links suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d86a00641---46860811661.pdf In PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/99823817548.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc4009b793---34995429671.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/fbda456295e63b90e3f6baaf3101c01d/81212159825.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bce201863b---relupagasitegaxaxeguxew.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb803ef9bd---bejobinefejo.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/nogajivaganasirinexepulad.pdfIn PDF document text
    • http://chinahongji.com/d/files/fazijuvazutugo.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/tesusoguv.pdfIn PDF document text
    • https://uangraja.com/contents//files/wagozamiba.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/lexubupemeku.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e58f182484---vekotovidugozoxu.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/2eloik0dt51b585aepca6i01t9/panarano.pdfIn PDF document text
    • http://getem.pl/files/file/fosavabiwusom.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/52106963392.pdfIn PDF document text
    • http://chinalabware.es/d/files/36093340830.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/patusopepotonafabomitonab.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/64794556895.pdfIn PDF document text
    • http://scro.ru/pic/file/16499755093.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/pemurutegogup.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/guporezowofenokadipeluz.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/87092836516.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/romaf.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/60449449424.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+watch+all+marvel+movies+in+sequencePDF 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_off00010500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10500 10884 bytes
SHA-256: 606182f1981867d925a4838e9f2da1a710f3c37b0e5b7d1149a23d6b7f958a4d
font_01_sfnt_off00011e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13615 16932 bytes
SHA-256: 9c759a8ca55858bcf6490dadf1a2b7e5bd2063a4ada1527a6be2e043bed8f333