Malicious PDF — malware analysis report

Static analysis result for SHA-256 57017eca1dee5960…

MALICIOUS

PDF

77.6 KB Created: 2021-04-26 17:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 755ff625ae113b4c822f0e0e31215546 SHA-1: 73acf9f92a8b831a1a1346b24ab45c2856b07dc3 SHA-256: 57017eca1dee5960ad8d07b8f62a3a3d2e6b7c2c835f18f2c7071f0105f071f0
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for 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 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
  • 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/strik?utm_term=discovery+expedition+wonderwall+projector+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_6051ef7fd154b.pdfIn PDF document text
    • https://kamobukumigudeg.weebly.com/uploads/1/3/1/0/131069934/2ed5131f41f699.pdfIn PDF document text
    • http://lavka-karamel.ru/805121326451l1j5.pdfIn PDF document text
    • http://litvinenko.xyz/xojawaxiropulur6wn7i.pdfIn PDF document text
    • http://rabota-plus.club/after_you_jojo_moyes_download6zb12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415052/normal_5ff7d102070c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478414/normal_60245cefae136.pdfIn PDF document text
    • http://ujjjrrrrr.space/office_football_pool_template9u2pw.pdfIn PDF document text
    • http://azalea.store/how_to_learn_english_fluently_free_download4ovk7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408875/normal_60025313d2801.pdfIn PDF document text
    • http://amsidisi.xyz/54293185160stqae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453914/normal_5fcf06745ce4c.pdfIn PDF document text
    • http://jesemozoki.22web.org/subject_verb_agreement_rules_exercises_with_answers.pdfIn PDF document text
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/mileb-memox.pdfIn PDF document text
    • http://vinnipoh.fun/dell_optiplex_7010_motherboard_form_factoryr35k.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/levovod/gasutami.pdfIn PDF document text
    • http://bejopobu.epizy.com/63685060182.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/2979368113.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/berserk_manga_deluxe_edition_volume_4.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_off0000f051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF051 5616 bytes
SHA-256: 75c912bdb769097e3133bd384cb69c28027020f6984cb75f8c9297a9d180f475
font_01_sfnt_off0001037d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 11008 bytes
SHA-256: 41ace5054170933dc663b8811c71b9d61c16042c614ad4016faa639d41a9dc38

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