Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6ccca991a1183b…

MALICIOUS

PDF

102.0 KB Created: 2021-07-19 00:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c57d35082af435db184a3166c9ffd9cb SHA-1: c206ed306a9e466a471eccd43700110596239c3f SHA-256: 4f6ccca991a1183be5d8250cb9ea19328e8a1b600e4818aada24dc244dac76a5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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 https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/a3a896e6a642c89398aca5b3a08c40da/salawetogikakesap.pdf In PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/tasoruvezirurogobawiner.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/ed99d4a0734ba91025c258f2d1ee2222/xojewuxuviludijabugafi.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a27b8e684---94200431886.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/f20c5cb8c0a14ab337d386bf9a952e0d/fajobizig.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc658d5f6a---63503935206.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a9608132d---99758815128.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/j08ptje9o7bael8l4nrrq28icu/26632146383.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a2e9c983d---45169897403.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cab5af34e6d---26198875785.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/vijisetobusubidexidodato.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/nitetugubibajag.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/81495375847.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/48283477590.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/75834014451.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15c91df2d6---kabewedefus.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/ritenozerori.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7aae38d75---70766290909.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/kavoregup.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/72384426269.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/h1pj7hqealpg50v7ja0qp19kib/19361296990.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/cf54b1870a65edc877c9d53707f288e9/bexobawakizizuti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=grant+apply+self+employedPDF 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_off00012a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14297 10720 bytes
SHA-256: 129a798a6272cb77f668534bf45ec991a7ef5d1747ec8f3c53ed967a40fdfaf9
font_02_sfnt_off00015b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B49 18060 bytes
SHA-256: 498cf8b918eee847c033eab2fa2fbb042ad6b49daeca8b087f4ae5c2cdda77cd

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