Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aedd27a434a0198…

MALICIOUS

PDF

93.9 KB Created: 2021-07-08 00:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3b05a6b63c175f9c3ed09e70731629c7 SHA-1: 53d0f8b73221a6112ccab6eb9ea77401f640d3ef SHA-256: 9aedd27a434a01986e60b3dc7c558d6636855a08148406f4bc934d640e6bcb0a
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Analysis reveals it functions as a link farm, with numerous URLs pointing to external sites. Several of these URLs are hosted on compromised WordPress installations or disposable domains, indicating a likely attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://richwoods1969.com/clients/861079/File/11825089123.pdf In PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/090c9d1e07d02028cea3c9efe27642ca/tovidopevabixiwiganuzozo.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/2612758bbcba911852181f9f302361c9/divawoxu.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/31a60bb13c6888a6a02d4c1ec8d5b25a/85378002895.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801a934f455---sapipafebumezone.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a974d2bc1---13462208605.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846c6d6308a---kivazukofakizenipawidowoz.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/a68457771300dbd0f5ad86c5d6da343b/tugojamalapuwirame.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/3rhpp8m7mmuct6nalsjp48np5j/97007436660.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/makavefilod.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/c4a6cb895459c7904ac770b0f7c4d7bb/rakefugoj.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/9204519615.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607db207e3210---87811414123.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/e56a57d1ffea94fe825db639eba9f199/20349306281.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b171cc468aa---59586186953.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210614_1EFA47C17444ECA8.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/565878f280274b91fb30643a69bb253b/kokegipokuvevalusuta.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/bijivo.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/jo6n35gqoftjmo2bctmnj47fpl/xovezeneropudamu.pdfIn PDF document text
    • http://citywideok.com/clients/75789/File/76524013489.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58b770ac9f---fixuwedupomemisab.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/25735799790.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/86587155968.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9760c7c8c---48624747906.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=should+you+put+your+gpa+on+a+resumePDF 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_off00010c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12444 17372 bytes
SHA-256: f98275fff39014d664e670dbe1e1207b2f70c7e9955b8d3fb5ff235c06fd00a6
font_02_sfnt_off00015106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15106 11036 bytes
SHA-256: 4d8e6241fc28dadfdb6ce6a27332f9becf4064a8e0c6c246c87a5286d1ba1cb5

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