Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45dbdee2260d646…

MALICIOUS

PDF

70.4 KB Created: 2021-10-08 11:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ee313e06dfa11700a0685942fbe9e740 SHA-1: 43ba3206089ee93013ed1a25c205853f054b2ef2 SHA-256: d45dbdee2260d646d44e8f8844764c21c06dd62d40ee23e00e141fffca35e836
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable or compromised domains, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a common phishing or malware delivery technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xn--evdebakmhizmetleri-k0c.com/uploads/file/ronubemawedoditajepevabew.pdf In PDF document text
    • https://visualmotion.nl/uploads/file/zamevima.pdfIn PDF document text
    • https://marugame.hk/editor_upload/file/93084875039.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/xowufobanef.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/14096776919.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161588ef1008ee---24755268512.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/robuwakuvemanekosesid.pdfIn PDF document text
    • http://fitviewer.info/files/file/relapixipekexa.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/15577720074.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/99651835856.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/43023751862.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/tenozabono.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/ranarozut.pdfIn PDF document text
    • https://avflash.nl/upload/files/33042192210.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/gonisirerif.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/wopude.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7ddeaedce---nozasoxogugoze.pdfIn PDF document text
    • https://constructor.dilen.top/upload/files/badikalisesafanerubaz.pdfIn PDF document text
    • http://ijpdua.com/contents/files/80253600869.pdfIn PDF document text
    • https://siroyensao.com/upload/files/56835458402.pdfIn PDF document text
    • https://promoform.coreform.it/uploads/file/jomizupimimadovatiba.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615b4301787ac---75915771157.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+play+jazz+guitar+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB333 15940 bytes
SHA-256: d82c0beac1eee304c09bffd35c01bd61a91c0c6d192adea35f2c80d3fea645e3
font_01_sfnt_off0000db99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB99 10752 bytes
SHA-256: ef7358bbb884b0e0ac06acaac4f90fd0aa2d5fd544e5aee922a3e4416dfd9146
font_02_sfnt_off0000f43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1