Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f596120816c9a4…

MALICIOUS

PDF

77.9 KB Created: 2021-04-08 21:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 73bfc0017a1aab1de2a17578774bc981 SHA-1: 5219ed5f94ba5628df8d66b0d9c5b1321df63e07 SHA-256: f0f596120816c9a48596efedd5b478a6ec8ab9179f550098946be7fcc126ffaa
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-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://mezovuduw.ru/strik?utm_term=winchester+western+24+gun+safe+price PDF link annotation
    • http://copyrightsupportforlnstagram.com/99_year_lease_agreement_sample7ta7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_601c5cea9e6a7.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/odisha_police_verification_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_6052fc68a4e8a.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/79062576939.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/cXibTia/xowexasogawededibudezifil.pdfIn PDF document text
    • http://citimart.online/employment_contract_template_uk_wordh8ubo.pdfIn PDF document text
    • http://santand-es.com/the_red_umbrella_chapter_8_summaryzmy0c.pdfIn PDF document text
    • http://regsenatvumen.website/who_is_batman_after_knightfall_protocolqz8rk.pdfIn PDF document text
    • http://megantv.site/tigubitukivunesivokubanehmbxt.pdfIn PDF document text
    • http://rikafitamedad.medianewsonline.com/60429829267.pdfIn PDF document text
    • https://cdn.sqhk.co/vovigewuva/jjiiaWQ/975458647.pdfIn PDF document text
    • http://astrology-personal.online/area_and_perimeter_ks2_worksheetsq7hh4.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/xbox_gold_codes_generator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_cc35d3d0388140858ead4f216c4e1603.pdf?index=trueIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_c232bfe6645e4de387930e4ad76f5774.pdf?index=trueIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_ffed61cddcb248498bf6484e030b49d1.pdf?index=trueIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_b4250dbc2c0345daab1d88038e00ce02.pdf?index=trueIn PDF document text
    • http://noratev.myartsonline.com/46848778673.pdfIn PDF document text
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_e39ec584339c40e993c87658dfe40bf6.pdf?index=trueIn 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_off0000f2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F0 5568 bytes
SHA-256: 370de9b8b17fe3e279efd9cb29ca2183ea8069a3c2215a25b50a6719e3e15fd1
font_01_sfnt_off00010603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10603 10516 bytes
SHA-256: fb2a2420ee2b3efce8361d0d24e6efdfa314046ebc06fa8b434b6f85e071bbbe

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