Malicious PDF — malware analysis report

Static analysis result for SHA-256 784832dae64e8179…

MALICIOUS

PDF

108.1 KB Created: 2021-08-14 16:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9b6b859248dc969e38ce53196b878997 SHA-1: 8db9c809b1975ae0fd1618732ac7d3106845b77c SHA-256: 784832dae64e81790a4386dcd312f8a1fcc72bdd5ac1f053e142ee192d99bd13
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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.mediagrand.hu//data/editorfile/sadebogomimotesev.pdf In PDF document text
    • http://rosycaffe.com/file/fukezitofewofalipozebaxoz.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/48952848453.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d7db1c5b7db---bonomifise.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/pjlhpdao8j4ooof0b4djpqkia0/xozugotilobomajotonufu.pdfIn PDF document text
    • https://paradigma.bg/uf/file/dawegirugoladudimef.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9306a4c5fd---zuvikavesitixibatogupe.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/37013582415.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/29571a22cae43e86dcf33a52c90c0bc2/nukugesesoduf.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/31303912845.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d697b11ca6c88acfa470e3ecb4b13947/38792484123.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1610d35e75ff64---pafironugoxofexitiz.pdfIn PDF document text
    • http://summithighschool1958.com/clients/71652/File/41598190056.pdfIn PDF document text
    • http://agrion.org/upload/fichier/vapawidudupe.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/8943d3ef9768d9a820711e36ffbe3ec3/44208159656.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/1014748a451fd59bd660a1d34838de0b/50321892899.pdfIn PDF document text
    • http://shophouse.info/images/files/46040809520.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728ccb7be3a---giwugeluvowux.pdfIn PDF document text
    • https://wipaphun.com/UserFiles/File/bowufimopinekidulufikupep.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/80190377306.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/4370791f1bfadc8786bde546ecce8bd0/268925416.pdfIn PDF document text
    • https://hiroyoung.com/data/files/zodanovosuxuzen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=lego+jurassic+world+how+to+unlock+dinosaur+skeletonsPDF 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_off00014610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14610 11016 bytes
SHA-256: a43090813f48ac8780d69f39eb014eb2d642cf6dc6857f42ddc90867959d58cf
font_01_sfnt_off00015f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F6D 16496 bytes
SHA-256: 9c851e59f635277814796ff251c4f89d387a9ed9223b85e6f70ae79b9614a69f
font_02_sfnt_off00018a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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