Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2d35016f73b54f…

MALICIOUS

PDF

82.9 KB Created: 2021-09-12 18:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f78cbf02f0ec0587128914a07ffa9b43 SHA-1: fd213cf8b8fbc1c1409bace28ecf03c4d757d5a1 SHA-256: 3e2d35016f73b54faec2b0be783a027fa8de0d00440e6ee7ecc0889779da58bb
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms indicates an attempt to direct users to potentially malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://feynburg-uhren.de/uploads/50447984815.pdf In PDF document text
    • https://sintasyapi.com/img/userfiles/file/90174049088.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/81660233760.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/zixuxudinazutitawizilinir.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/popedemabuxaru.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/241250a74aa9d147cc30dfb0c5047e1b/32877205650.pdfIn PDF document text
    • http://tomekorea.com/userData/board/file/goguzekekixekafadaxex.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/3b04904fbe6ac2b18d54babd2473b85a/17560985965.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/79633682162.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcaa7c087f---sisaxonebujuxaduzele.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/14153393148.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/moxapofofuju.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/45020504339.pdfIn PDF document text
    • http://trubaopt.ru/content/file/xoletelejozeredevano.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210905_025004.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/64934002411.pdfIn PDF document text
    • http://tayles.com/uploaded/dijezinakafuvegebapevof.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/lotarezizarigijaro.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/161387e1855fe0---xevawijeja.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/3803889564.pdfIn PDF document text
    • http://imi.vc/upload/files/7557662043.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/47473211122.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/betakudunaduwuxod.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/86240002251.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/jadifizikatoweg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=angel+has+fallen+online+freePDF 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_off0000deae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C0 18180 bytes
SHA-256: 742a690afb0fbffe9007287a4d3e1cd62d3624167b256aed79f176351d734620
font_02_sfnt_off0001266d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266D 10376 bytes
SHA-256: af35ca933a5203275d41b3729080089b38316ee6cab60fa34c143f893d1659ae

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