Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0b3a2f2179d039…

MALICIOUS

PDF

75.4 KB Created: 2021-09-01 11:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 341cca1feda618b658cd2b739d2860a4 SHA-1: 1eec645b38501f7a852f9275da937ac7475b52c3 SHA-256: 7d0b3a2f2179d039dca4b43d1b008b0127e253567930c3409321aa5dd36bb736
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://amirep.com/wp-content/plugins/super-forms/uploads/php/files/11a274eb9ef4543a003772ada6e44f3b/katin.pdf In PDF document text
    • https://detmers-kontejner.hr/files/24485664392.pdfIn PDF document text
    • http://maremania.net/img_pagine/file/12413470437.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607eae63f2371---jozezegonubitemupomuba.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/54716301397.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/ec5d6be4edce2ace2c0fd8dfdd8a7bb8/futinaxenagesenajakenafok.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/pnpebrjr09ua0fji4ff7ehe5s0/13929775729.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/4e742a4980275d752bcdb1989e76ade5/kiritisotexogagujare.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/5a5aa19d29ee217c2d21b73fda8f8913/wuwulofumotugemovofol.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/75207288493.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/10629941314.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ab603141acc---48984958205.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/381d9e52f1746ed7ba56881e0b127f43/27428484380.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/81556337956.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/38186564781.pdfIn PDF document text
    • http://mobiliteit.nu/files/jolomarewemut.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/gurutetona.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/biwizuridovazuma.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/tunixepatujoruteseteroxu.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090f7e424879---31302250930.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/h7pgvt24a9449mhmmp1hv6s6ee/20734887274.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb5a787180---puxurawokujivimuj.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/watotojeseriwuvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+speak+about+myself+in+an+interviewPDF 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_off0000c2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C5 16708 bytes
SHA-256: 329ff66ec881859773a7b662dd6f64f7b0b8a533a15794250f606a6c82ed497b
font_01_sfnt_off0000edaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C6 11108 bytes
SHA-256: 92d56b00e916fb073096202ab48ddbd47d517229d47f03167a5a799e4c7d2642