Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2fc7b220256dd4…

MALICIOUS

PDF

69.0 KB Created: 2021-09-18 01:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ae71af83fd75b8154231b91397f5992c SHA-1: 9393d1274a6b6e39806dd9b82b9c5f85118a224b SHA-256: ab2fc7b220256dd4152961bd591eb9c31a4a29edd90586311dc325459a651f86
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and numerous external links, typical of attempts to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially compromised websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://philabc.ru/uplcv?utm_term=geoshred+free+download+for+android PDF link annotation
    • http://travellerisland.com/files/putawizapixutexa.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/file/1630966727_1.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614505f78ec21---fatalibamokafugu.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/sugoxiwo.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/fololekej.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/52783884771.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425ca920885---kenotudos.pdfIn PDF document text
    • https://norservis.cz/files/files/tenikofuwux.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1614139d5243f1---26496171043.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/83286595260.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/73109172554.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/juserufadedilifipuligilo.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614420b714610---nudigereluremurofo.pdfIn PDF document text
    • http://salkim.com/userfiles/file/niroral.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161450a7ea34e4---21062167512.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/lelibutakodetij.pdfIn PDF document text
    • http://eluvial.com/sites/all/sites/eluvial.com/files/11985050448.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/82775053913.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/96239869890.pdfIn PDF document text
    • https://elger.cz/fckphotos/file/29589956552.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/49e7020904fd3875b8fe94d68653cf7e/dukafip.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614209d418347---10594386033.pdfIn PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/29733974337.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/dojifexaxovivokeno.pdfIn PDF document text
    • 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_off0000b350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB350 10476 bytes
SHA-256: d0e6009b3c7487ed9b9032d9c09572a21171e48d816508cb85da31a8fcf14314
font_01_sfnt_off0000cb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB16 14060 bytes
SHA-256: fcdf20e4f8aae4c841c2527bb9cdcdc0f6edddaf34985391815741e5fb2c33d2
font_02_sfnt_off0000edf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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