Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad2d5259fc975cb…

MALICIOUS

PDF

77.1 KB Created: 2021-06-30 23:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 11852c78d27a6773ce6938cdba5fbe22 SHA-1: 8c4a7864126f4175adf9c3cd684580c099cf17d3 SHA-256: 0ad2d5259fc975cb9c6fdaf6e76a55a66904ebc273816e2aecdff746e76ae29a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier. A critical heuristic indicates a 'Clipboard command execution lure', suggesting the document instructs the user to copy and paste content into a shell. This, combined with numerous embedded URLs pointing to compromised CMS uploads and link farms, indicates a phishing or credential harvesting attempt, likely leading to further payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/gn8v9pgkq172me7ueb4tqhr4h4/tidajewinod.pdf In PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/e2212213e7991d023ff0600f1a3ca567/kudolonomudulo.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/51s691ef5t4tr2nl1fm59kk2t7/xilekux.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/75359812797.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/22c9e8712da4e55a3d3d0a0cb7974f45/nuvevupo.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32541f4e3---48054879882.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6c7c6bea2---majamisi.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/50d46ba8d04efd22b61486d214dccde4/nexovavaxajoxomapafoz.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/40054130052.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/lhmdnf1an5n1f4mbo7kekj8037/waselizekalufixikor.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/27ac6abacf2e810c6a970bc70833ef7a/pivetegudubotama.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/q2j5e9tefbb231d6eaqicsgi5k/41552024612.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b266a32899---48291902006.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210622154209.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917c2cd9e00---gilekiwid.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/5b159e1d0def86864403c569b3868569/56290467312.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/5f07a6f5202e56970f3d5074a296b74c/58047696070.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160be0a5f03775---63458352651.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021062123525997.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077562ea019a---9936702913.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982d089b71d---serulejozogaloviwutujagu.pdfIn PDF document text
    • http://azizolace.cz/images/file/mesunere.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/27744258559.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/3485b3cab698208f455c4ed6905fd365/wamolorojozulajisuw.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a9761b86136---17152366523.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=bhd+to+php+todayPDF 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_off0000ca32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA32 10016 bytes
SHA-256: 5a1ed6dae12622cb19d599fea4364551e09180844d244095abdf57de419580f6
font_01_sfnt_off0000e089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 17692 bytes
SHA-256: 4e3a3409838922da5424d2966c4dd4d3fff79c896d6fa74ab3b449c0b1760a43
font_02_sfnt_off00010f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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