Malicious PDF — malware analysis report

Static analysis result for SHA-256 5059cf8dc1cd40ae…

MALICIOUS

PDF

74.6 KB Created: 2021-02-23 02:03:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b19f9324a4e3be384af24c3dcbcc1a08 SHA-1: d080bdae678448166a60456f88060f1ff0eaae79 SHA-256: 5059cf8dc1cd40aee826e0ecc3eb12d568f1d510781c3e084a8088d999df97cd
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with several pointing to suspicious domains and identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

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://leonvi.ru/strik?utm_term=bond+order+of+c6h6 PDF link annotation
    • http://orbitan.fun/watch_the_spectacular_now_online_frerp6v2.pdfIn PDF document text
    • http://wersita.fun/61908470753f5bbn.pdfIn PDF document text
    • http://devgm.design/xolemawuzerujanelok4tfs.pdfIn PDF document text
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/957806.pdfIn PDF document text
    • http://mivetys.xyz/98385253309oyo6g.pdfIn PDF document text
    • https://cdn.sqhk.co/mikakiraw/QjfT3ha/23148131828.pdfIn PDF document text
    • http://yewes.fun/how_to_model_operational_risksg74l.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/7WcSzi4/star_wars_data_east_pinball_for_sale.pdfIn PDF document text
    • http://prosale.company/xawotifusipdjmls.pdfIn PDF document text
    • http://mkr-olimp.info/juvuzejafuzopuzujujudhy8n.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/349147.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/202jhLL/srs_topup_agent.pdfIn PDF document text
    • http://topfrag.rip/pakalifenorabuvulasuduvino9myw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/latest_gst_council_meeting_report.pdfIn PDF document text
    • http://fosekor.epizy.com/is_lavazza_good.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/line_graph_report_writing_sample.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD68 4552 bytes
SHA-256: 1144f4c572c06a9abee95a5ba7430a676b1c3f85e029439bc0a51bd73919068d
font_01_sfnt_off0000ecc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 10268 bytes
SHA-256: 9c6cfba7d8240eae1b8503be386ec056249f3fe4fb260a2f1ecc83c566727f99
font_02_sfnt_off00010fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB7 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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