Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd2577a1f3cdd05…

MALICIOUS

PDF

69.1 KB Created: 2021-09-20 13:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7846cd2878131f5cefdfe677369250ca SHA-1: 1966de2108af91a6f438a74e14e964263f499362 SHA-256: bfd2577a1f3cdd055cfc493728b7afe6a8b6eaf6f745c853a30f98cd7f70c699
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • 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 http://valosagoskincsesbanya.com/upload/file/tesijimobixeboxalebefukam.pdf In PDF document text
    • http://nriloan.jctoursandtravels.in/files/kabumidazutetela.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/81013007533.pdfIn PDF document text
    • https://beautydent.hu/editor_up/fowububobu.pdfIn PDF document text
    • https://playindiano1.in/ckfinder/userfiles/files/kitududopegalutadidi.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/tuxupojukuzebizurilawilef.pdfIn PDF document text
    • https://stotex.rs/files/96334971556.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/vajonudosorolape.pdfIn PDF document text
    • https://timminsrenovations.ca/file/aKsGqNipRQroYJIn.pdfIn PDF document text
    • http://vatlieubaooncachnhiet.com/userfiles/file/muzimowirexuwosidu.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/9a173136ff522559da72581aa5bfc336/43187049344.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/95288973924.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe5bcb4a4e---sixogi.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612edcbfde7ac---67908419873.pdfIn PDF document text
    • http://paradoxine.com/upload/files/pabulugi.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/19466542280.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/funikowew.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/83204208246.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/wupazezer.pdfIn PDF document text
    • http://gr-chem.com/upload/files/vopaxazu.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/46639837610.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/kigirivodotebex.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161333bdddf6b1---puwinowuraxenajod.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/11880629260.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=last+night+full+movie+onlinePDF 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_off0000b1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F9 10684 bytes
SHA-256: f142200ba7955f25f31caf452a26ebee0b615572021f2e0c93072ab60ff6c3a2
font_01_sfnt_off0000ca51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 14532 bytes
SHA-256: 6aa25a4ef82599c0d52a6e106b84a16af6da4ddc37491eedc8ee404b9ef7e565

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