Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bfbf8a911a40f9…

MALICIOUS

PDF

81.6 KB Created: 2021-09-19 00:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9104db8ca4e2259ff48a8d2316ca5ff2 SHA-1: 5bff280f7e8b9cb63c8d1ddde33c70f4a9b92637 SHA-256: 47bfbf8a911a40f9769c18540425198c61751535e8f85e3a71624e1ce6c819f8
196 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to potentially compromised or disposable hosting, suggesting a link farm designed to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ahcxdq.com/uploads/file/060027166952.pdf In PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/18164472090.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/gunipebatuvimesusaduvi.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/nemokanuxaji.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/28311298291.pdfIn PDF document text
    • http://ecole.ru/text/images/file/75774535814.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/b4dd32d7226bee42094ab7d05a425aa0/gogeso.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/pozupezanenagijojisuxe.pdfIn PDF document text
    • http://bassonconsulting.mc/userfiles/file/83143704673.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/63640605401.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/80375975311.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421b009bb1b---89233340557.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/welid.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/mufurulev.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/53293772265.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/80144937537.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/bobepebopisares.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/nigitimaruribitubebafisa.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/mulomumigikigufenizofixo.pdfIn PDF document text
    • https://stotex.rs/files/zagegabugobexopakivibex.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/26847527840.pdfIn PDF document text
    • http://prograsifkalip.com/files/13302131659.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/38547418085.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364b0da9c59---28309071428.pdfIn PDF document text
    • https://cahayamimpi1.com/contents/files/72254527244.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=open+apk+file+windows+10PDF 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_off0000d9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 18148 bytes
SHA-256: 8104e6eeeea84773c8e9982660af53e1d91007c46cfa7547cd29fbfc947eb45a
font_02_sfnt_off00012091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12091 10668 bytes
SHA-256: fcd3ffa078ee709214c6b4d967f4d400382a4116afb928af1ef3c7c4777897b0

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