Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb572ad71401c930…

MALICIOUS

PDF

73.2 KB Created: 2021-02-20 11:33:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3cf00769422359dd6e631f450e48e891 SHA-1: 0fe82158c2cef54dae0886165cd4a33e94dba7fc SHA-256: bb572ad71401c93076cd09c7d3b16742f08dad6de9e2e018f70cefeae2ab1393
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=relative+humidity+and+dew+point+worksheet PDF link annotation
    • https://cdn.sqhk.co/togokitaz/8yOUIoW/42699953594.pdfIn PDF document text
    • http://vibubag.22web.org/55671387793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393353/normal_6026beedbbda6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470038/normal_60174abb66d11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451365/normal_6019847bd8c4f.pdfIn PDF document text
    • https://cdn.sqhk.co/ropikenetu/jahj8hf/liker_app_reviews.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/jaloto/misop.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/baby_einstein_neighborhood_symphony_activity_jumper_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/network_signal_speed_booster_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/bienestar_animal_unam.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/45178771225.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/41251812618.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/agreement_of_sale_template_property.pdfIn PDF document text
    • http://lepefefila.epizy.com/is_daughter_in_law_a_legal_heir.pdfIn PDF document text
    • http://metukobitoro.rf.gd/briefing_paper_template_microsoft_word.pdfIn PDF document text
    • http://fixadamobus.epizy.com/canada_food_guide_guidelines.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_off0000e32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 5524 bytes
SHA-256: d2032d6bd0c6366abf5cda433ec23034376e266a2e9864e8f774e0374534a93b
font_01_sfnt_off0000f5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E2 9904 bytes
SHA-256: 58d4d2cedb4f042b5d1c9177c124ff8a743ddc190c30e640fd4e1ae7ea036632