Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd429df2be196db6…

MALICIOUS

PDF

93.8 KB Created: 2021-06-29 20:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 172f93afe17d396e089097af6ab43486 SHA-1: 7dc546477c90ed7b5860143d11288ecbac79e20a SHA-256: bd429df2be196db62478d51c36bb934344c545485e50aae026b68761593dedbc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/xuwutabubekomitexerunutor.pdf
    • http://mppscstudy.com/admin/usercontent/file/35458865000.pdf
    • http://shqinze.net/admin/upimg/file///78246219.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb7b06b85e---11230554624.pdf
    • http://alexlunacoach.com/img/editor/file/jumexotenelexi.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/ae36cb645474cf2947cac4b02b709a16/8533161399.pdf
    • http://esoftland.com/userfiles/file/kagezejegaboli.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/8bp3sdfonkolfkp9sb696alj31/93099634516.pdf
    • http://zulassungsservice4you.de/bilder/file/30326173021.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607234e44d37e---825777326.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/8d3504ce901015147714ec3056ff38b1/givajiludixejozedozibu.pdf
    • https://uleshuzatabc.hu/files/file/58660536894.pdf
    • http://aldara-latinoamerica.com/userfiles/file/91567288226.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894a9c9d317---21191186216.pdf
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/jipejalokipuponidalewuw.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aced6f34778---masadamuxabemevebevezibix.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/4b9cd2a322272228b09c44ff9695f205/69799433051.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16083c86048fca---82992614898.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/ho0to6595q7jvctpd8j9237nk3/46508040057.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/1c0639c9b52e0711571f4772d8ed64f5/3792462239.pdf
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/favupoveminazosugotomeje.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=my+maths+answers+listing+outcomes
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109ff.bin
07226195380fee3f6a0f5b94c0f43a94f6599c083d2a275b89b714b470d624bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x109FF 10968 bytes
font_01_sfnt_off00012364.bin
836337418cdd20c3bd3fe8cdc37e6b7c3c0e1b864a73decf710c1826e0029bb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12364 17884 bytes
font_02_sfnt_off00015236.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15236 16792 bytes