Malicious PDF — malware analysis report

Static analysis result for SHA-256 806253eb0aaee17f…

MALICIOUS

PDF

81.8 KB Created: 2021-09-09 09:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1b1210419f0652ac7f2adbcb8bc42f05 SHA-1: 8e533a0cc4c72450ca6fad2234b66d43e008a0fc SHA-256: 806253eb0aaee17fa8e887d0bc905e6cc59ddb2f4582f6e2093be00dd59fa667
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.companyforte.com/imagenes/editor/file/patapolefijutajatew.pdf In PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c45b9d2db---14794066251.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/99848605052.pdfIn PDF document text
    • https://campermagazine.tv/public/file/miguvatazi.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/25658295409.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138495e261c5---56497192530.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/nefivoxozum.pdfIn PDF document text
    • http://potlista.com/file/files/13325787275.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/mawekefu.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/ketab.pdfIn PDF document text
    • https://emmaushuis.org/pages/fetevosumefokesazopovave.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/perawaxinakorus.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/21578084183.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1630915682/files/24933245917.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/reronud.pdfIn PDF document text
    • https://combrooncom.com/contents/files/49931162020.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/f8ra58bls01hrh3raak4tt35qi/jebalititone.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/r587jh4tpa0si9atc9qc0l9nr7/repotazoli.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/42124100697.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/52969491339.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/nuzaxobenedopon.pdfIn PDF document text
    • http://www.plan.msu.ac.th/ckfinder/userfiles/files/93522867569.pdfIn PDF document text
    • http://zamgph.com/uploads/file/090638479415.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/takadozadotirigitiz.pdfIn PDF document text
    • https://qfse.co/images/uploaded_files/ckfinder/files/1631168879_9b1c897dda.pdfIn PDF document text
    • https://proxus.nl/file/24801283177.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=colonial+bloxburg+housePDF 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_off0000db96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB96 10664 bytes
SHA-256: 58f2af20c731ccb1e27d9902b0cadd4b0e6dfb5bf1d4c100388c532167742462
font_01_sfnt_off0000f3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F1 17900 bytes
SHA-256: 2aee2624d9ded163dab0cee749262a7993b0231ae590f2cf84206aeb5f8baa45
font_02_sfnt_off000121e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1