Malicious PDF — malware analysis report

Static analysis result for SHA-256 0971ee746054cf0d…

MALICIOUS

PDF

74.9 KB Created: 2021-09-05 06:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 065c9dfcf6ed12b9fd6c17ed41518806 SHA-1: 016de761daea06acd9ab71aa1a4b10435d87a4f6 SHA-256: 0971ee746054cf0ddd02afb42de687fec8e2a05d1ee0fc48baf7ffd0c3257411
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

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://dutchfansitenetwork.nl/ckfinder/userfiles/files/waxadixezebusipevoramana.pdf In PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7147a1558---retixisexumonanumugesuz.pdfIn PDF document text
    • https://andrejc.si/files/file/88867263762.pdfIn PDF document text
    • https://micsys.in/userfiles/file/zazodatatukatuluv.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/besubewonipuzozabiwimuru.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d3e72727f---wavufoneladerafijoma.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/62688810131.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb9aa5a6dd---fufil.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/24637619965.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/1701278607.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/28605119661.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/67dc2acdfad85b5397a7376831f74e1e/ronet.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/sesegi.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/kaxofazijevosanifuxakaxiw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d82cb5bef8---36731100360.pdfIn PDF document text
    • https://brigitte-farner.ch/userfiles/files/11026728667.pdfIn PDF document text
    • http://idroter.org/userfiles/files/37598223947.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/46104418335.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/sv4k9m8fvnfukkk419bidgn232/11299024437.pdfIn PDF document text
    • http://davcpundri.com/css/file/pulifafevujajipitakoruv.pdfIn PDF document text
    • https://kamarkosong.com/contents//files/4792636610.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b81d28799d1---tepizopijozaliwanupipub.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d57b87da3---dubajapokovazev.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/8b5c0efcb3456c9d96126198dec4aca4/31416070944.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/mokimasijoja.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/0ib90io5cqf75coud75fc1b3h0/84510957190.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=patofisiologi+osteoporosis+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F7 10568 bytes
SHA-256: 1a672e543166d90603b26712010fa5305454619864fceec164e0a9f0c34ab75a
font_02_sfnt_off0000ecff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 15280 bytes
SHA-256: 00b5481f42c843ed45c88e03e2581a1079a2ba6855133e8d03244e30aee66547
font_03_sfnt_off00011432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11432 1948 bytes
SHA-256: b033f7fcbcd390b2cb396fbb5f03ef01f7ca9afc151f9d9df21604321f961cfa

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