Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb99fadd2b6af9e…

MALICIOUS

PDF

79.0 KB Created: 2021-09-01 21:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: afbcb0996788050d4274e63baf593e92 SHA-1: bada5e29dab3e08f7a25499307b1e9e34429e84f SHA-256: 0bb99fadd2b6af9e3c7c530e6e1ec9ce0cf2bc1ee7cff2211e0197644d76faa4
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 ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting, likely to distribute further malicious content or lead users to phishing pages. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/8213p3q4jml02aeh2g9c603hk0/rupafajake.pdf In PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/oj9sjo8lae1bh8icl7v1v04bu7/54806383579.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/df362198c9f18940baedf4d52e367812/dozabo.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/7da5af19b371350e0f104169345a058f/zinopexenurigon.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/renofefigilakiwukijanew.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/23691685585.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/40226238974.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/novuselofisowafujanova.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/61596814189.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/23410462660.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/letuke.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/gp99qjfoosnv2o7qamkj9cdnlk/50142464447.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/a297d9b681c57e65776fa37a185fda30/86637103869.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612596de4630a---wivuxusojolafazurisabu.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1df3b248a4---49611462255.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096e36e2bcd7---xuzevasutafavemuzu.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78fec1f9ff---tagoza.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/zigiroso.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/30047177259.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/zekanuzevibolekuwo.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/bewonetakesiparexorupubak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=bpa+free+bottle+meaningPDF 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_off0000d013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD013 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 10728 bytes
SHA-256: 681637e09cc145ea066ef88891fc9019feeadb451d7031c8251f75a5eeb6a261
font_02_sfnt_off0001008e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008E 17764 bytes
SHA-256: 26c7b2eb59361325f93c3ccb324d847e5ab14e0e1cd1efec01c02eae00e15fbf

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