Malicious PDF — malware analysis report

Static analysis result for SHA-256 5faca2422c98d838…

MALICIOUS

PDF

78.7 KB Created: 2021-03-20 15:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1c6e049307f47567438f4079d5ead9ab SHA-1: 258c954e1ce0738ffb4caad219b89b73bdf8395b SHA-256: 5faca2422c98d8383c1fc13565715549da3101f5217e66fd4feb6f4c34018d2e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to reference a Bluetooth speaker manual, serving as a lure to encourage clicks on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://gimoguvi.ru/strik?utm_term=iworld+bluetooth+speaker+manual PDF link annotation
    • https://cdn.sqhk.co/nuvexajamu/aib0r7Y/soccer_state_championship_rings.pdfIn PDF document text
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/zerewegavepakurazig.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/manual_de_piscicultura_en_bolivia.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/36bcccba46fd0d.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/what_is_sum_to_infinity_of_a_geometric_sequence.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/kusolepurogorc8heo.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/eiihbax/38313825314.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/uZhjeje/vupoxunejaloxuwapisuxuram.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/28eb60d89c51f0.pdfIn PDF document text
    • http://7lessons.website/nibisefuwitakujuw9si5p.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/EWhcNgh/magic_carpet_mini_golf_galveston_prices.pdfIn PDF document text
    • https://lidubudizut.weebly.com/uploads/1/3/2/8/132815063/21a1abed1.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/gvmyijd/zuxelapo.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/what_an_annual_household_income.pdfIn PDF document text
    • http://bristol-yalta.run/73934638134l0bt0.pdfIn PDF document text
    • http://kowuterada.mygamesonline.org/archival_materials.pdfIn PDF document text
    • https://xetamoro.weebly.com/uploads/1/3/2/8/132815737/tidusuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vanatul/ansys_thermal_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/25595022510.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_off0000f6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AD 5432 bytes
SHA-256: 54f9d767eb300dfd5ba9003ccff8d4615ae1e055646aa2954d7867aca8fb49c9
font_01_sfnt_off00010901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10901 10780 bytes
SHA-256: ec32afb6aa255f028a7699c9ebf7dc27626a5fdd9eefaf9eee8fcff74e1f8b34

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