Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa2f68371af9a5c…

MALICIOUS

PDF

77.6 KB Created: 2021-09-18 00:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bf8b527480d975099079ad0063b19b0d SHA-1: f0ffa4a807e8b423206d7f5d14cc337b35f54941 SHA-256: 2fa2f68371af9a5c4e14bd4d50a11b640149c7f39860282f388dc29960475e69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs that point to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614095dec538b---64970290091.pdf In PDF document text
    • https://kokomanis.com/contents/files/52508444206.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16137e8cbc071a---87369792171.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/kawowezufovaxet.pdfIn PDF document text
    • http://woodwaysindia.com/uploads/nivexu.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/fobokewodevejogadoj.pdfIn PDF document text
    • http://tubelessons.net/cms_images/file/rorolutagurofegeraruz.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/27336176138.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/efbd2167dd6ce8fc436eb8c643cea1ea/49417324039.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/livomuxutadofug.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///48203650054.pdfIn PDF document text
    • https://bfull.ru/uploads/files/48585898227.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/tolojunobu.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/gepiru.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/masekejetujudijob.pdfIn PDF document text
    • http://fgosvo.ru/files/files/begifi.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/8649633605.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/votomijamosop.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/97206127291.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/78392149896.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/pajoz.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/33902712434.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/lamozavilinisas.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/80789508218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=erase+una+vez+mexico+1+pdf+gratisPDF 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_off0000c7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CF 18376 bytes
SHA-256: fe35d56e7f96ee3080523f4006e2799fc1d44368d7bfba433e4f705facc3a904
font_01_sfnt_off0000f682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF682 11280 bytes
SHA-256: 9da58fd65d71d7d65d90244a533f6bbd84370f64bf2449a49fe9feda995601e2
font_02_sfnt_off000110ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1