Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc14cf181cab124…

MALICIOUS

PDF

78.0 KB Created: 2021-02-25 00:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cc50473d668a83f8480fadb272e5146b SHA-1: 155da2e50a694463cd3337b245f11762e308cd5c SHA-256: 3bc14cf181cab124794b21508a79cb821fb307eb647d4323a318e6134350db99
184 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics as malicious, including a critical finding for redirecting to known malicious infrastructure. The embedded URLs, such as 'https://crophysi.ru/award?keyword=waterboss+700+manual+en+espa%25C3%25B1ol', are designed to lure users to potentially harmful sites. The ML classifier strongly supports the malicious verdict, indicating a high likelihood of phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=waterboss+700+manual+en+espa%25C3%25B1ol In PDF document text
    • http://kindraretterath.com/575386868882zfww.pdfIn PDF document text
    • http://mybestchan.online/who_owns_huskee_mowersfvhyc.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/mizapipokutibes.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/17022840783.pdfIn PDF document text
    • http://klokisik.space/xoxafa4og0h.pdfIn PDF document text
    • http://yazansoft.com/cnc_programming_principles_and_applications_by_mike_mattsonrnrm9.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/asp.net_mvc_tutorial_w3schools.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/5NEx3jc/rovigub.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/f4iey11/24987974363.pdfIn PDF document text
    • https://cdn.sqhk.co/menekilebuz/jjhihhl/dead_man_walking_jeremy_camp_live.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/navy_civilian_jobs_2020_online_registration.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/50295862187.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/87012922827.pdfIn PDF document text
    • http://lianhua.life/86224029289v6bv.pdfIn PDF document text
    • https://cdn.sqhk.co/mozulunilex/zhip0jf/40534732992.pdfIn PDF document text
    • http://life-news.tech/979429528954znu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nununad.myartsonline.com/modos_de_produccion_esclavismo_feudalismo_capitalismo.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/25339351817.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/hr_consulting_services_proposal_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/dedolugamijopan.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/77214152582.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_off0000eaf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF2 5552 bytes
SHA-256: c75897b3ef38cc6caf3ae7f532b71d66ca4630db4e9b651e837791d5a14e8ebd
font_01_sfnt_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 13604 bytes
SHA-256: 4249d9de5d90878cf40237602acc4b5f366fa17cd315caadc490b88c0c93d67d

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