Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef06ddab22217ffa…

MALICIOUS

PDF

108.7 KB Created: 2021-03-03 21:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b4d8db2e77f68c440aef602def962160 SHA-1: 4995fd37778277bcf79c829e7ec599ddf0f8f1e9 SHA-256: ef06ddab22217ffa8b8a984c2f23209e51f846333d3899039bce0aef120ae15c
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/wix?keyword=age+of+defense+5 PDF link annotation
    • http://negurosivaz.iblogger.org/53019201890.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/give_5_example_of_each_classification.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/zowufibefeturakigon.pdfIn PDF document text
    • http://punaweb.iblogger.org/61609426400.pdfIn PDF document text
    • http://dutajigupunad.22web.org/noxejepupexape.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/high_protein_veg_food_for_muscle_building_in_india.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/lunutofoderati.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380411/normal_5fc88f0d99ccb.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/top_10_rules_for_internet_safety.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366316/normal_5ffbd579d5967.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447914/normal_5fe5325fce452.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/zurovajij/full_form_of_miit.pdfIn PDF document text
    • http://zotowivivakav.rf.gd/kujido.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/35387649838.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/20360963849.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/53223332975.pdfIn PDF document text
    • http://vafosune.rf.gd/what_is_the_formalist_approach_to_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/fazewezipalajumurexodiwe.pdfIn PDF document text
    • http://zowujobosega.rf.gd/free_ppt_templates_for_teachers.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/66582359118.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C6B 5312 bytes
SHA-256: 92fb7d799ff17c056a978bd3bd487286d5c943f694791d6b4bd273a3fbeba4ec
font_01_sfnt_off00016ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EC1 4848 bytes
SHA-256: 1f39d1b6609da1c45cca04b2b425d234de3763e93919476fb477b0a128b89694
font_02_sfnt_off00017f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F69 11120 bytes
SHA-256: 46eb71aedd7f485e3abb3402ad98e94c49426f8ccc7451d40a8627c6835a7f3e

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