Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fd9b96ce8bfefc…

MALICIOUS

PDF

75.2 KB Created: 2021-02-16 03:38:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c6f5ac8849192eaaf570d65792efbfaa SHA-1: 46ecfe7a4ce8d262ffc87db28dda9f5a02866a44 SHA-256: 76fd9b96ce8bfefcc0170f49146c1e231dfe9ca5f2fef0e295716df3660b81f6
156 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with numerous URLs pointing to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://druttle.ru/wix?keyword=eso+old+orsinium+puzzle+2 PDF link annotation
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/jejiduxazabogaxeto.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/gEPgjFC/auto_clicker_for_mac_free_2020.pdfIn PDF document text
    • https://gawokani.weebly.com/uploads/1/3/5/9/135993895/a5883be4d877948.pdfIn PDF document text
    • http://kuvofejom.iblogger.org/aggiornamento_instagram_iphone.pdfIn PDF document text
    • https://voxisazemiruza.weebly.com/uploads/1/3/1/8/131871554/wanitamara_pifokojexolun_murebef.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/ggkjghd/driving_zone_russia.pdfIn PDF document text
    • http://vitolebizojigok.22web.org/61044572671.pdfIn PDF document text
    • https://kubuvapag.weebly.com/uploads/1/3/0/7/130776206/3056808.pdfIn PDF document text
    • https://wuwinotidewav.weebly.com/uploads/1/3/5/3/135349353/e75d5027b4d7c7.pdfIn PDF document text
    • https://cdn.sqhk.co/babijuvawov/iagieia/wivoliperuvonajuf.pdfIn PDF document text
    • http://instup.xyz/jepiwidijutvrx2z.pdfIn PDF document text
    • https://bapamebitisetup.weebly.com/uploads/1/3/4/3/134325238/3a067e76.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/mYtgjgf/state_parks_travel_explore_offline_guidelines.pdfIn PDF document text
    • http://fruktovik.com/chichora_full_hd_movie_filmywap1xbn4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dowirefe.rf.gd/rome_metro_train_map.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/api_platform_filter_entity.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/free_flute_sheet_music_disney.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/the_boyfriend_rl_stine.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/bitrix24_website_templates.pdfIn PDF document text
    • http://disorasejazamu.epizy.com/infectious_disease_society_america_guidelines_c_diff.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_off0000e83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83A 5036 bytes
SHA-256: 8f8214c4750d19fb45c70b7b2b429a614f69c105cfe245b87f5711d8b00a079d
font_01_sfnt_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 11432 bytes
SHA-256: cca5ceae15afd8aa599f9b0676fb01f3ef2d8d3479006e500c5b04cea154b209

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