Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89185bac6a5127e…

MALICIOUS

PDF

76.9 KB Created: 2021-03-02 08:14:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2f79bdbace87f88b4285defa45a5fabc SHA-1: b9ab9ceb3641b86d3f74d7decc04c3e652a7671c SHA-256: a89185bac6a5127e70f580b260170b49e37f2fef9a62755cc9673928473600fb
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, with a primary focus on directing users to `xezojetit.ru`. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users by redirecting them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=rob+skiba+podcast PDF link annotation
    • https://cdn.sqhk.co/boxumiza/JAhjidg/online_storage_auction_near_me.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/what_is_an_example_of_distance_and_displacement.pdfIn PDF document text
    • https://cdn.sqhk.co/livoluxuwad/iigcjfA/99122312188.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/what_the_density_of_water_at_25_degree_celsius.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_6022e14c91478.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/ihhtn7U/18724174104.pdfIn PDF document text
    • http://wexonosuzovub.22web.org/directsoft_6_serial_key.pdfIn PDF document text
    • http://vobonenagixavus.66ghz.com/ccleaner_upgrade_free.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/24615658876.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/uOeZIji/genujizetivotarowufegifu.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/9l9SXMp/dilizupefunoxim.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/area_of_triangle_using_determinant_worksheet.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/los_censores_luisa_valenzuela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428069/normal_601d0d88e77b9.pdfIn PDF document text
    • http://dulotor.iblogger.org/english_bulldog_pumpkin_carving_pattern.pdfIn PDF document text
    • http://kufemotobenin.66ghz.com/perfect_attendance_certificate_template_microsoft_word.pdfIn PDF document text
    • https://cdn.sqhk.co/taxuvoguraji/Uhajigd/8163857063.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/kimupafidoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_6031153aabee0.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/xedewofuretujo/39445709965.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/68531532605.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_off0000f18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 5148 bytes
SHA-256: 958c4e9fde89dfc22c4e35847d54dce24194626aa26e300fdafaa47c6e46163f
font_01_sfnt_off0001032b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 10240 bytes
SHA-256: 9395ff593bbfb4e2ad0e265892fd39f1da69fe0b755aaab15f4f3faeec8b8728

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