Malicious PDF — malware analysis report

Static analysis result for SHA-256 1096beb811e2221c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-23 11:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f358c219219a49b1858afbb15aee2a17 SHA-1: 5425d1b9f2a8ef642851bfb84278ced3047d6361 SHA-256: 1096beb811e2221c2f57704270d6f7aaa34b355103d5965fdc5606a5c7294d27
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://botokaw.ru/strik?utm_term=2016+lexus+gx+460+off+road+accessories PDF link annotation
    • http://sixesijilolun.mywebcommunity.org/dr_seuss_books_learn_to_read.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_6040a20101e08.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/application_letter_for_teaching_job_in_school.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_604d03bdc9c17.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/how_many_carbs_in_large_dunkin_donuts_coffee_with_cream.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/jesus_what_a_beautiful_name_piano_chords.pdfIn PDF document text
    • http://xazupadapafow.mypressonline.com/alice_munro_selected_stories.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5fe842ef3bbd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425255/normal_5fdbbf3883977.pdfIn PDF document text
    • http://dosijaruwiteli.mywebcommunity.org/life_science_grade_11_human_impact_on_the_environment.pdfIn PDF document text
    • http://gasurorir.sportsontheweb.net/41276711112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c21a521-7e02-49cb-b489-7bf74bb55b49/56657098906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79936dc-f00a-476e-b8a0-c730ac72f3e4/how_to_tell_your_power_steering_pump_is_bad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/babb01ec-290d-4791-bdba-addf413c6039/joxazaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38de6fbd-fefe-489a-a9b2-012cedee7fd6/62766939865.pdfIn PDF document text
    • http://jujobope.atwebpages.com/nuxerotilotuzuvoriweze.pdfIn PDF document text
    • http://nufulavidibime.myartsonline.com/fuderadetugusepujesut.pdfIn PDF document text
    • http://tajavuminona.atwebpages.com/aeolian_harp_an_anthology_of_poetry_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b405cbf-7909-46fb-ab94-c11348830294/los_nuevos_profesionales_jose_bobadilla.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_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 5728 bytes
SHA-256: f373f0def337a2e78a85d51259073837651bae9efd1b0cfbbd96b88eb5793984
font_01_sfnt_off000103da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DA 10948 bytes
SHA-256: e331d19ee74b34cb371544fcec468e421deb5cb80c984c263d8ec4c7670e5c6c

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