Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9328f32c4b4d44…

MALICIOUS

PDF

73.9 KB Created: 2021-06-14 06:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 07124fd8baa3c5f49b05b32c727b3b53 SHA-1: ba76cd763898b68fc99bf3df126fe5e05d20cd60 SHA-256: 7d9328f32c4b4d443dab36547b0b4f8c90a468c259602973f66290d182b00b42
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is classified as malicious, exhibiting characteristics of a phishing and social engineering attack. The document's primary function appears to be a lure, directing users to install a browser extension or update, which is a common tactic for credential theft or malware delivery. The presence of numerous external links, many hosted on disposable domains, further supports its role as a malicious link farm designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pbw?utm_term=how+to+block+websites+on+chrome+mobile+without+app PDF link annotation
    • https://bodupojuribun.weebly.com/uploads/1/3/4/7/134758420/6502562.pdfIn PDF document text
    • https://matuwulivusoxuk.weebly.com/uploads/1/3/4/8/134897084/6775857.pdfIn PDF document text
    • https://sonikegusu.weebly.com/uploads/1/3/3/9/133997348/tarivapexi.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/1951428.pdfIn PDF document text
    • https://danivuzi.weebly.com/uploads/1/3/2/6/132681213/sumexisuvi.pdfIn PDF document text
    • https://bopuxokefira.weebly.com/uploads/1/3/5/3/135300507/donat.pdfIn PDF document text
    • https://jijelejo.weebly.com/uploads/1/3/4/5/134590633/4418705.pdfIn PDF document text
    • https://vadurijale.weebly.com/uploads/1/3/4/5/134590900/vivulefanatawidotel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473622/normal_600d9fe19ab9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_6020a1af23d34.pdfIn PDF document text
    • https://japugaze.weebly.com/uploads/1/3/5/2/135295186/1774465.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/3342ac7e45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413121/normal_60031de02fefb.pdfIn PDF document text
    • https://feravenokitaj.weebly.com/uploads/1/3/6/0/136095553/gugalunuvefug_zafegebavi_fevaj.pdfIn PDF document text
    • https://loputoporebile.weebly.com/uploads/1/3/4/8/134847610/f0c031fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vomuseteweto.pbworks.com/f/rividof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d67ccf-1d48-478f-90f6-0b466e2ecc38/what_does_media_studies_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/849aa553-53e7-48e4-9354-4c41adad4617/download_windows_7_pro_32_bit_iso_from_microsoft.pdfIn PDF document text
    • http://febamizilaw.pbworks.com/w/file/fetch/144609783/what_can_i_eat_on_a_high_fat_low_carb_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f74ee4e2-5d1d-4dbb-b01b-ce3cfee607b6/juwige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56dd4521-7891-42cd-b0b5-b6dff47a9518/duredadiwoxov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf5efa04-2888-4be1-803a-6945cbb828f1/64988210467.pdfIn PDF document text
    • http://wuwazilizos.pbworks.com/f/download_origin_for_fifa_14_apk__obb_full_unlocked.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39C 5428 bytes
SHA-256: 4f57d940e168113e950802ca9c76a844a3c2b9fa727c0eb31baf0bb161a7d21e
font_01_sfnt_off0000f5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F1 10496 bytes
SHA-256: 39c4d32cd04186ec4677feffb62cdcdae5ae9e4af361cee0a0e452d20c5aa18e

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