Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d9a1d81e253062…

MALICIOUS

PDF

74.4 KB Created: 2021-02-28 23:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3791a63ff14eda14e13e4824f0b9090e SHA-1: 27ce2c515958f9eee748488018ceb0cb6e76f2ca SHA-256: 09d9a1d81e253062e7f4aaf77ca2f9a9f18a04cbc18fc235bab7a41be5dd11f1
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ML and ClamAV as malicious, indicating a phishing or trojan delivery attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely for SEO poisoning or phishing. The presence of embedded URLs points towards an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=functional+training+exercises PDF link annotation
    • https://cdn.sqhk.co/bagadogod/dijQgjB/alone_pic_girl_cartoon.pdfIn PDF document text
    • https://cdn.sqhk.co/fofimajazuw/RE66ivM/retroarch_switch_no_cores.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/fugome.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/79089989310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453901/normal_6038cab7ecaf9.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/NYic0jc/vuduzanuwug.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/mpZihhh/matchington_mansion_hack_club.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/ji6xYG4/viridian_city_song_cover.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/77411297690.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/9ggHzgh/teraxotidevud.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/46555770152.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/sennheiser_g3_or_g4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokosen.atwebpages.com/cute_black_boy_names_that_start_with_t.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/jeximilenekozenodof.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/google_spreadsheets_for_windows.pdfIn PDF document text
    • http://futakanawus.onlinewebshop.net/tiene_la_estructura_de_un_texto_narrativo_inicio_nudo_y_desenlace.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_off0000e41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41A 4988 bytes
SHA-256: 78bd22827eb5ea67e3bb4a4d3acfb2505763d5486aee500e4e2bde8cb7a2151b
font_01_sfnt_off0000f529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF529 12128 bytes
SHA-256: 658bc8ffba2979a7c5c2774ba3d87bf5a22e0d2efc5566a9fd476c28496285aa

Open this report in the interactive analyzer, or submit your own file for analysis.