Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed78df7dec1b3f3…

MALICIOUS

PDF

82.4 KB Created: 2021-09-05 19:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f69100820ba35d7a23ac8f96baf67ddc SHA-1: 584c1cdfb67f26a2063b2f039259b0c0cebc53d0 SHA-256: 6ed78df7dec1b3f3dcb5157b2f381bae7eadb3f099aa350985161b0e38778f5a
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be part of a link farm designed to obscure the true destination. The presence of a 'compromised_cms_upload_link_farm' heuristic and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://starwindows.ie/ckfinder/userfiles/files/17440937730.pdf In PDF document text
    • http://pkynfe.net/userfiles/file/13504561392.pdfIn PDF document text
    • http://yjccnc.com/upload/files/molozikuvo.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021043023035036.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/qeb76obust8mrdmt5i0qtkelub/nusitokapufefodozeb.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/t4gtlk7ntk5dhct9rdc1pqulvf/pusijizovigu.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/53868e9d1374ee2bb002b20056ee1e2c/dexaxasuru.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610dd52c2033e---wanev.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16072f6784e2d4---60232722487.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/rezudumuj.pdfIn PDF document text
    • http://juha.be/_files/file/42883430720.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/15607005875.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/55895464948.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/dolomirozuriraju.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e13d0ac5c63---zidoravonogidona.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/26557544415.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/bezezanefazeserawusabip.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/96514213468.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/96284697212.pdfIn PDF document text
    • https://bem-sa.com/img/file/sevopewugavizipav.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/g22ko1gcsllu5236i275u414r2/95013294424.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/06f1b578b1fed78a1ec33ee36d6da887/46066900781.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/15394013094.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/45082827308.pdfIn PDF document text
    • http://print-resource.co.uk/ckfinder/userfiles/files/fomavepog.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/solomewupunobaduma.pdfIn PDF document text
    • http://odumakus.com/uploads/files/fonagusebirimuzixara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=canon+eos+6d+mark+ii+instruction+manualPDF 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_off0000da92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A9 10924 bytes
SHA-256: 6f062882ebd68dcc7c5590be89ccc00e608cd3ae43e7a0cf57d2d6a7c790ee15
font_02_sfnt_off00010bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFB 18232 bytes
SHA-256: 45e6a58ccf63a7f48d9e5dd5e39dda8934a86540727283026fca2390d080bd0e

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