Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0a0ca9bea822d6…

MALICIOUS

PDF

83.4 KB Created: 2021-09-03 06:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b59ba4ad5b07025edbdcc0f059213a73 SHA-1: 3d08adfd05e11b2929113c73a6b14a80292cb365 SHA-256: 0d0a0ca9bea822d6658afdec7e05f0a760d9bec11441bd1ddf97defe38b516c2
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many embedded URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612de6b11ff5f---kusiridaloripefaburo.pdf In PDF document text
    • http://a-kamen.com/userfiles/file/55464212133.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/12493996f2f652d5c4b60628a7a52fa5/22226087258.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/25039213142.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/30153491300.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/94734939949.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2f2b912a8---tosofik.pdfIn PDF document text
    • http://ihvanturizm.com/rsm/files/94909306064.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/waxawewojivepijeberojes.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/3284982012.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ctglt8kdp3umr5rg7holte1mhe/56548008494.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/27490730530.pdfIn PDF document text
    • http://gistys.com/userfiles/file/zexowu.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c385a3ea5a---lijebogazerezoruwufubavaj.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/64167758572.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d5e0c434c---disasizekavozuwakejipaje.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/jazir.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e435b39538---bixoxokutupetesojexawoma.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/7401406899.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/5972d1ad0247432c5947ab9151bae685/sunixubirok.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/80956609161.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/oaq817p534apq5jc6iupopl8l3/78298569228.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16081ddaf23bf9---dorafebibanobafixelax.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/07b47562f6af897ecd8141f07ad57062/zizinawoginojetopaponoru.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/3ff5fa44894ad6b266624cd6a2544f77/25497475319.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=singer+8280+manuale+istruzioni+italianoPDF 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_off0000df9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B2 11136 bytes
SHA-256: ad1e2d7ec388d7e96cb67febce8c0206f4840172fa3f3215170ce3bbf5334cd4
font_02_sfnt_off000111cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CD 17664 bytes
SHA-256: 1199dae3eec7b568feadfbdf2674b6fbbd7de8cbd6b8ed0ec8660bcb7efe8546

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