Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ea2d5f775c0f74…

MALICIOUS

PDF

90.2 KB Created: 2021-07-04 04:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: aa02cbb8aa17f93114c88a69012ddf18 SHA-1: e9080284dec0b0c73f2f501f6269d7d438409c88 SHA-256: d0ea2d5f775c0f74ab9f16e50e91b24925f167a5df4440af8ca87662a987c28d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which host further PDF files. This suggests a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887115c81c3---91444165061.pdf In PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085cadc022f7---basovivub.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/a24a6f979a36d4aa72c883203f16df80/fumozojivemex.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/49314dc02b583fc4e47173f658497184/61759594017.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/palirixusumunupisegux.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5084f361a---89783739311.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0057d8dc2---zefafafivupawozugimute.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96d29df841---lefizojuveroxalatojomawe.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/6dc5b0b261b50d4d67f6feff1dae378a/famukezife.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/setiguz.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b4220d0a---najefudobizo.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096fd93d9f3a---neraketofuki.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/pah0vpak25aaohnsuahsnuj3t9/zamemunufini.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/26274289762.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/31967522795.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860ff7e4907---mevemufirovidutawesojox.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents//files/fanison.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16079031a628f5---87345292768.pdfIn PDF document text
    • http://ddrwc.net/clients/869849/File/12955591458.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/r63sip1101v8psfibcdb6k4pq3/silosulanorupujubukej.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/2df057d899fe7ad11a1d18bc17858cfc/32771199654.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160b667127bc2c---23670807308.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45fd618a60---1665716957.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/995d73ebe62c93e527a7b896f2aca0e7/73684255808.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=sorry+to+reply+latePDF 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_off0000ffe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000117f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F9 10068 bytes
SHA-256: 0a31c2890192c2c6a5ca2df5dc4fcba430ff7a1696917996f64fc42c1505e25f
font_02_sfnt_off00012e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E98 16868 bytes
SHA-256: 167cf58acc7069f28c0c97cd6900b85f1bfe496a0049165381804c02dcf8cb21