Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ded8746d45b07b…

MALICIOUS

PDF

80.3 KB Created: 2021-02-28 11:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 577bcf375356aa08bf51631b27914b21 SHA-1: 5e0e4de3d04b54148d5ec129574b98fb5184ae16 SHA-256: 08ded8746d45b07b5f212010cef1d7ead2ab8930f6052a0ef84ccc94feb009e8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing lure.

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://kuzutuzo.ru/strik?utm_term=what+does+management+accounting+focus+on PDF link annotation
    • http://filuniguwol.22web.org/chitralahari_movie_songs_doregama.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424647/normal_5fc712893ea08.pdfIn PDF document text
    • http://sojarenenu.iblogger.org/138020595.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/2245895420.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/blackstar_id_core_stereo_100_guitar_combo_amp.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/pematoxukomixit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5fd7d3b1907ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tegufomaliduki.epizy.com/wujetogurixikimifopedata.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/how_to_clean_the_krups_coffee_maker.pdfIn PDF document text
    • http://sovurizoduzugu.rf.gd/13260714168.pdfIn PDF document text
    • http://warunegiluj.rf.gd/82657772599.pdfIn PDF document text
    • http://debarunuzijabe.rf.gd/que_es_un_estado_de_derecho_y_en_que_nos_beneficia_brainly.pdfIn PDF document text
    • http://zanavaf.epizy.com/what_is_error_1001_on_itunes.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/64523131596.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/47795011641.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/94377682078.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/god_of_war_ps4_controller_guide.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_off0000fbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB9 5320 bytes
SHA-256: 9b16cf97d3e1659f18310bf77f11ddaa419a5a8a0668042fc397ab814f39bf1a
font_01_sfnt_off00010dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC0 11164 bytes
SHA-256: c3c5d76b67a8fd4a6ddacc2532b43d48054caa2fda53872699caa7483eb92190

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