Malicious PDF — malware analysis report

Static analysis result for SHA-256 640185dabb151f60…

MALICIOUS

PDF

67.3 KB Created: 2021-03-25 06:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff88353d45314060a4fa59c6b5a5369a SHA-1: 8d57b70b9966276ea30080fe1e22c8476f2e7564 SHA-256: 640185dabb151f605c12cbab13bcbcecd193bfb08d1f12f8eadc7919246c3310
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one prominent URL being https://seumenha.ru/wix?keyword=witness+statement+example+nsw. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=witness+statement+example+nsw
    • http://idslim-italia.site/kexetogejito991mx.pdf
    • http://nevozepamuj.iblogger.org/midumopidumunogilibefow.pdf
    • http://jolixasij.sportsontheweb.net/on_writing_well_chapter_12_summary.pdf
    • http://ig-soft-team.com/prokaryote_vs_eukaryote_worksheet_answeruba6y.pdf
    • http://minosijasif.mypressonline.com/15290481824.pdf
    • http://lumacy.site/57589628913s6ek6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_a66978dc427048619e0f847d938d3474.pdf?index=true
    • http://viladanus.epizy.com/59703800762.pdf
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_6511a3dcec9f41349fd92fa8cb6859d1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b32d212e-6686-4976-a461-7fdac8ed414d/dark_souls_ii_scholar_of_the_first_sin_ps4_review.pdf
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_ad02f2e41aa74b92b00f68a17eec9cb4.pdf?index=true
    • http://fetekovabu.onlinewebshop.net/pixodoxiwipuxizosasazojeg.pdf
    • http://gigitepusiligo.epizy.com/malayalam_thriller_movies_2017.pdf
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_45837a9281a84c5092a2209a279aac36.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cc488ed6-a706-4b2e-b232-c8392df48370/zaparibibezi.pdf
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_6760f54f64e94965a476413d8e72d249.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dae310ce-4b74-4c80-b85b-a97f12c3e79c/how_to_use_zoom_with_external_microphone.pdf
    • http://vixugow.epizy.com/95371649427.pdf
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_b53b0295548846fdb03989e20fed4e04.pdf?index=true
    • http://gujimosodaza.myartsonline.com/chacun_a_son_gout.pdf
    • http://jikafazasakojob.epizy.com/ata_thyroid_pregnancy_guidelines_2017.pdf
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_cc52af7a8b414c6592ee43518d22a519.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc6a.bin
c4c9f07d92bed8d8ba6c4ae9615de69e7a96a3743dd3c7648c5ad428349d1ca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6A 5040 bytes
font_01_sfnt_off0000dd9c.bin
ecab34092a3b2b9b4377a18fbf2c576aa1bc90a16119008a003f325b8ffc6dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9C 9984 bytes

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