Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3453ede43225762…

MALICIOUS

PDF

105.9 KB Created: 2021-06-30 00:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c3e978f2853df581f9e12a59021c08c9 SHA-1: 5381c9f4599ddaedde9797780a89bee64263e775 SHA-256: f3453ede43225762fae7a3259c8db88c1506533905728d6f550c0850442a6257
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of multiple PDF_URI heuristics points to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f0104e8f2d64b37dfa956cfd174c7db6/wunofuvu.pdf In PDF document text
    • https://hurtowniaroza.pl/upload/files/sodetirofaz.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/4063eceb927fe1fd9ea0d2d121aaa429/19300196546.pdfIn PDF document text
    • https://atesolve.com/ckfinder/userfiles/files/damagoxivebupakekelolofev.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/nexazegizofigasaju.pdfPDF link annotation
    • https://psfund.org/public/uploads/files/cms_files/99443470251.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b37c403e---17923060611.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/jelisuwege.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/48155422884.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/bc8fab9175c615997c4c4c2a07d6e091/fizabakidevifigurezasilu.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/18564182738.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/kufesalodijixifumara.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d90ab0c124---lotup.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607167e8f0642---49554328436.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/61306798196.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bb6d99bf2---86334598056.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16098483c867ff---zipemod.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/8a5a774ceba4e65ebd652b4e2e1831d4/zuzavemeb.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/savewuwuxokasipatejuguves.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/762243b06945dab58fee92eb805b8dc5/warofowazirunimo.pdfIn PDF document text
    • http://salkim.com/userfiles/file/jipeliriwos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=dynamic+agriculture+book+3+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13864 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001507b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1507B 11416 bytes
SHA-256: 4dc7165393ffcb944b807c66d1225a522d3627e829208dfbc16c112a5ce3b51a
font_02_sfnt_off00016b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B0A 18416 bytes
SHA-256: 57fdf96c9f0ca9d67145d4e12fa99c054de1bd148e005f62ed4a22f08ad9d7ad

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