Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ab91e9befa907f…

MALICIOUS

PDF

68.4 KB Created: 2021-09-29 10:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 8e68f17dc94cdc43ebf34b89ef4f49dd SHA-1: ea8968813067924c3e793a2c585baf8a3df9a294 SHA-256: 29ab91e9befa907fe130da0a4fb7276edc467b30aee2d197b99df21a89f4136c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF exhibits characteristics of a phishing lure, including an image-only design and numerous embedded links to external websites. The presence of multiple links on disposable hosting and compromised CMS uploads suggests an attempt to distribute malicious content or redirect users to phishing pages. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to trick users into clicking through to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 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://coretry.ru/uplcv?utm_term=capcom+vs+snk+2+apk+download PDF link annotation
    • https://rainbowfurnitures.com/files/files/magogido.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/14595901942.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/24839806264.pdfIn PDF document text
    • http://stefani.cz/fck/file/medoj.pdfIn PDF document text
    • http://magischtheater.nl/userfiles/file/94617495367.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/2460161691.pdfIn PDF document text
    • https://greenlakecruises.com/ckfinder/userfiles/files/rimanadizozusibunapudezo.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/55942747391.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/jovebipapizerufoson.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad2e026bc2---vatubepisunor.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161445735bf0ae---nodiwuwi.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/82341432523.pdfIn PDF document text
    • http://nb-magnet.com/upload/files/tovuxoge.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/f518ad59dc12c1affae47b091e9b375f/25735870060.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/4652412605.pdfIn PDF document text
    • http://surestegc.org/documentos/file/49671046264.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/161461cfbc44a1---tisok.pdfIn PDF document text
    • https://naves.cz/res/file/5806434398.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/balinorixaxetusaw.pdfIn PDF document text
    • https://foursservices.com/nbloom/fckuploads/file/muladewasisumaroseviwor.pdfIn PDF document text
    • http://vecsecity.info/editor_up/tadil.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/87365940437.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/20512768905.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/43505307639.pdfIn PDF document text
    • http://tuzoltosagmihald.hu/userfiles/file/85737274679.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_off0000af82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC794 14464 bytes
SHA-256: 67951267ab3596cb4550ff2f993c5cf9298571d2c0be65931235f03ed7a04c89
font_02_sfnt_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 10648 bytes
SHA-256: b5ea19bb4f5d3a673e0347bec5e91d132f28df4cc161a470790c506292a73248

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