Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82bcbab32bfbee5…

MALICIOUS

PDF

83.4 KB Created: 2021-07-16 09:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e06bf657b48f5a322343b3c7a229f241 SHA-1: 672c61c12e2c06d5a7c0dbc848518528c40d02ab SHA-256: d82bcbab32bfbee5b8b14a688cb9090524dfaee9c8e7747afdecad8084646723
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document delivery, often associated with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/d52ac2814fc4c641b6b8a1908e8fc54d/lenejan.pdf In PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/97461275291.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4ee0006e8---gawakajagu.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/32938970016.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160af8f8ba2298---ledabasagoloderumov.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/75757153787.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/5483519795.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b73519a3821---99160365500.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/c9mfhh0kvn9dh2gis43risbcor/34164932489.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/xipegekebag.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f797464bc2---50144252436.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3259c1aabb---25285914187.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/kelilobiwaloxotos.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/c88565dea4c91a270fa6f585d21a20b2/guwelib.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160be563f18e46---wakuxijurujixusegi.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/lenebuxijujofudeje.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/gimawopokadofinogejaveju.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1c3b8cad7---wamowos.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/7aa2962f2036f7f72edb653c7c172dbd/gizumadoxurevuwelegejoduj.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/da0590d9fcdfe4a7405ef191a0d35de6/napokapoga.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/dae99804094af21b99c4df2b8ce15a30/34630152464.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/54784679569.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=comparison+of+financial+and+managerial+accountingPDF 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_off0000e2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC9 16964 bytes
SHA-256: 130a3cabebeaeb8ca464ccbc1ddf147a1ec1968257d2bf6e6972dd44389c17aa
font_02_sfnt_off000126ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AB 11092 bytes
SHA-256: 8d58471f00feb7bf5f38d99908e0878d61a10dca7306b989a1dfaf3ddbc1ebb9

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