Malicious PDF — malware analysis report

Static analysis result for SHA-256 18788e541f430908…

MALICIOUS

PDF

86.3 KB Created: 2021-03-05 02:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7a10dda6212cb5ba5ca477b556e91f30 SHA-1: dbc65a22bd25613659107e611b74a6588518c8ff SHA-256: 18788e541f4309081d92fcb00045d4e4c902fe7cd7456b5faa0864042b69ca2c
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. The document body, though partially corrupted, contains keywords related to a Maserati Quattroporte, suggesting a lure. The presence of numerous external URIs, many hosted on disposable domains, indicates an attempt to redirect the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=maserati+quattroporte+2020+price PDF link annotation
    • http://fijexojor.getenjoyment.net/sizebove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406497/normal_6012983af07c7.pdfIn PDF document text
    • http://afracheat7.xyz/neniwasivin06z5.pdfIn PDF document text
    • https://rixafewokeget.weebly.com/uploads/1/3/0/7/130739987/6266655.pdfIn PDF document text
    • http://1green.space/apollo_munich_optima_restore_premium_chartvdqug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367646/normal_5ffbb142390e4.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/free_pen_and_ink_drawing_lessons.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/Kig1chj/zawoduf.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/how_to_clean_electrostatic_air_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/dgegfhd/alienware_area_51m_price_in_uae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_5fe9d809aa082.pdfIn PDF document text
    • http://dream-stat.ru/nubuxekurafothi8tb.pdfIn PDF document text
    • https://nigomiboxamu.weebly.com/uploads/1/3/1/1/131163879/seniletope-lukigagefe-menuzikosefavap.pdfIn PDF document text
    • https://mufogijagojar.weebly.com/uploads/1/3/1/0/131070489/2160220.pdfIn PDF document text
    • https://cdn.sqhk.co/lolumebitana/hiZjhsY/download_call_of_duty_mobile_apk_and_data.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/jbgflAO/knife_center_of_the_internet.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/f661e27d651.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500187/normal_5fec9ae83a65f.pdfIn PDF document text
    • http://loveantravel.xyz/ketorolaco_formas_de_presentacion1xmub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_0bf24bc379cb4a76b938c6eb1f70217d.pdf?index=trueIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_da6987ed1680407f9f0d5e5eadd80889.pdf?index=trueIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_15672004ed574f5a9d0f732b9726e9b8.pdf?index=trueIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_4f0b20266dd646a083b44b6d56a5bb79.pdf?index=trueIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_1959c9cabb454a96a57ccd07c44d5ea9.pdf?index=trueIn 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_off000114ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FF 5300 bytes
SHA-256: 103db17d4259b078ba7aefc894909e0aaab2627dd5caa828d31414012addf2f2
font_01_sfnt_off00012725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12725 10600 bytes
SHA-256: d794b5cd3e8c3482cecdf203033bf07223274ab121662073197c2c062e60fbeb