Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80b59e61de606b8…

MALICIOUS

PDF

137.4 KB Created: 2021-07-29 18:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: af2de0b00f20b65f7b63920e9daffd13 SHA-1: db8dd7b2ce332ee6e40d01446b6a3f3a04ca6deb SHA-256: f80b59e61de606b8e2a221c78d615dd144cc747418822a238f2a38d8a22b7ad9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is a link farm pointing to disposable hosting, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' shows links to compromised CMS upload storage. These elements suggest the PDF is designed to redirect users to malicious sites, likely for phishing or to download further malware. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://fixafilm.se/userfiles/file/wibosotaxitodozubozawavok.pdf In PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/dd263f217118ff6d83bc5b0831f78a08/deveb.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f615d15aab---wasamoxonibivawawumowaka.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/69274245841.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/vifagufusizuratogo.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/2891304cbd4f7d784bed2d7da514f942/xawuvipubivuwapowasetuxu.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/74723378138.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/jilutoximid.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/31267138275.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/50098683248.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/busuruzuli.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/5ccb6a811cd5829e4303549b1922dc9d/43401634626.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a13872be843---92272400492.pdfIn PDF document text
    • https://luminex.pl/upload/file/86238646008.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/asoes8fqgtrqtsb37tncihb400/wafifodotutirufokonizi.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160824e14358e2---zupinotunaguweva.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fra0ckf1e9nfjpfolp3qdfa9am/rijobugakemeliwot.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/7133dd2ba5177fbfbc0b9637433257f0/kenuzemixelufokizurum.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093af74bd108---9810647834.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/wirumaxut.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fa13a4d41---96774133361.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0050debb7---94603334717.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/9s60mfr7bpn7clrg411tbjoa8c/97658966416.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/naguvabopilutumizaduruvit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=sociologia+sustantivo+segun+max+weberPDF 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_off0001b390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B390 11144 bytes
SHA-256: cce84f3fc3d9f690b00b7ff4cc783333c381b37e0b42d35523cca6f0bc93bc8c
font_01_sfnt_off0001cdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5BE 18808 bytes
SHA-256: add728d22a3a3097663d3573a4b1f25f4b8a0c926b025f9e9aa7372f31a0693b

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