Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0249af5d7c4698…

MALICIOUS

PDF

84.9 KB Created: 2021-04-09 21:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9c140ee7cd57ffb90c9f869ff2af326c SHA-1: ecd41b469675f555ee594b4156afabcbfe0f630a SHA-256: bb0249af5d7c46989d68ff7bb7b66fd660c09c38f566f18c0e1c928147f17509
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and likely phishing-related. It contains numerous embedded URLs that point to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of this document being used for malicious redirection or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=bowen+family+systems+theory+worksheets PDF link annotation
    • http://sagunutu.medianewsonline.com/1952847391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450638/normal_6037bb1ebeb91.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/hheb4gi/kaxug.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/artikel_pendidikan_agama_islam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_601c7d5d3f35e.pdfIn PDF document text
    • http://theharaka.online/vutifukevatcs1c.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/nefotozigojilonarumopu2emz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469640/normal_6066496533069.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/u9Wibhj/8772011341.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/e0rgiie/whip_app_big_bang_theory_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_603ae866e2726.pdfIn PDF document text
    • http://twitter-center.com/gallicismes_exercicesm8oig.pdfIn PDF document text
    • http://koprovk.xyz/88351603478saz5u.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501229/normal_5fe00daebe2de.pdfIn PDF document text
    • https://cdn.sqhk.co/gojapawareke/akhbjiR/pepileradisenet.pdfIn PDF document text
    • http://fruitslope.online/41909079402wj9jb.pdfIn PDF document text
    • http://polnews.xyz/flooring_job_bid_calculatorbzddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393489/normal_6039ade349a3f.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/turelopekufitedejiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370265/normal_60074da4d4155.pdfIn PDF document text
    • http://moreprodukti.com/blackdecker_convection_toaster_oven_6_slice_stainless_steel_to3210ssdx1mw3.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/gumojitoxowu/HxIgfib/26797443214.pdfIn PDF document text
    • http://servempieza.site/how_to_convert_decimal_to_ratio_in_exceldrkbq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E32 5316 bytes
SHA-256: de047b36a0ba33a6ab9df139dc38b18e624439fcd8a0b35fdccad0f030799eaf
font_01_sfnt_off00012034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12034 10580 bytes
SHA-256: f56563d2f9a1e3e48813bf99019756e617b83c155684833435d7e9eb4a4df0ff

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