Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90a52c5566950c9…

MALICIOUS

PDF

83.0 KB Created: 2021-09-20 12:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 624be42752c09dd9874e7d350b33bc3c SHA-1: 98e8ceb5c9bbbcbdb2e4ffb680b02d68c6e4ab3c SHA-256: d90a52c5566950c9619054b8796803378797615f585161b143952da478f37052
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external URIs and is structured as a link farm, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded JavaScript further supports its use as a delivery mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://www.bankkartya.hu/js/ckfinder/userfiles/files/86042260392.pdf In PDF document text
    • http://itkaufmann.com/images/fckimages/file/jeguwekexuwiraruke.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/dufazotedovupu.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/42743386490.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/4436211746.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/tevononadunufajuwev.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/15841782137.pdfIn PDF document text
    • http://phfamilyrestaurant.com/uploads/files/46332740557.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/1f8514581376dc3aad6d2db430ee8109/lulitinewo.pdfIn PDF document text
    • http://foxdigi.com/userfiles/file/sizupemulikolaxu.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/karedo.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/63963509842.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/sudozinibafureputumakit.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/dogafisenixeliz.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/700540208.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/15500075586.pdfIn PDF document text
    • http://umhouses.com/uploads/files/pivasupizosuvudebujuvud.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/20450800255.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/24009403612.pdfIn PDF document text
    • http://pate4me.com/userfiles/file/16907334394.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/zuvodemoni.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/68904332054.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/fogalanogibosujawobulukam.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/82340454685.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/12098990097.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/ec1a1bc7b7d8a3e72b3a9fb27118b991/vafikifuj.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/kazip.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/perotanopolapijaluvik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=can+you+save+text+messages+from+android+to+computerPDF 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_off0000da9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B5 11328 bytes
SHA-256: b92074ba8e86de8f5ff96b3c0594412d468aa988bcd61516522a30e6556611ea
font_02_sfnt_off00010d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 18752 bytes
SHA-256: 6ec35a7d43482208afdfd22692b196027f4f953149a4517d7eeb8a0c6c0d7baf

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