Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe984d6eed3f55e0…

MALICIOUS

PDF

67.2 KB Created: 2021-03-07 13:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9213894264ee5727f91e90a7a02a63c4 SHA-1: b05e73cbe8c594a259efbe55c7355a4f5810c87d SHA-256: fe984d6eed3f55e005c6ff2458cdaf33404b70b718a82689cca76cb51d11dbc2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to 'resalured.ru', suggesting a phishing or malware distribution attempt. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=kenmore+elite+dishwasher+model+665+repair+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462714/normal_5feb94935fafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408993/normal_6011d214e44aa.pdfIn PDF document text
    • http://waliduv.mypressonline.com/how_to_log_into_my_old_facebook_account.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_6010275ca1c9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460471/normal_5fdb31768c7ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_5fd23a3424d3f.pdfIn PDF document text
    • http://gidpopiteru.com/munugezukamilumotuninameiydna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409609/normal_6020d1193ee9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408471/normal_5ff488488b01e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494868/normal_604401619183b.pdfIn PDF document text
    • http://2020coupons.info/sat_writing_score_percentilesy0rlp.pdfIn PDF document text
    • http://pasendapp.online/samsung_series_6_55_inch_smart_tv_manualkmh94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_601255c3332b3.pdfIn PDF document text
    • http://hotloveme.online/19330634625rsyah.pdfIn PDF document text
    • http://8gusevshop.space/144487811410916y.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/joserabiranixikoritux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sojaxub/phrase_answers_on_a_postcard.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/66923703960.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_off0000ca4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4F 5536 bytes
SHA-256: c0299b67bb499b88a93baf55ef9a2827e0e06f8d3322dfec88f48dc3606c0805
font_01_sfnt_off0000dd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0F 10096 bytes
SHA-256: 26126cc7c95ddacc526be3a7c36e0dc6fee9fa58c12a577ffa20df2c59a8b217

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