Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40945cabe0dcdc9…

MALICIOUS

PDF

86.5 KB Created: 2021-03-19 10:13:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9a34950764a342be63d89f612cdef268 SHA-1: 119b9074251c352c3c146c501434b6e73f6b9968 SHA-256: f40945cabe0dcdc95d16e55304f82a1767415eabb9bd7d0fe8069ab48d9a973b
126 Risk Score

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://druttle.ru/123?utm_term=lords+mobile+guild+fest+quests+guide PDF link annotation
    • https://cdn.sqhk.co/bupewazadufa/eheifhc/2843970961.pdfIn PDF document text
    • http://geniputan.66ghz.com/storytelling_with_data_visualization.pdfIn PDF document text
    • http://kobujiva.iblogger.org/niv_study_bible_large_print_genuine_leather.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/hfjdyhd/lego_hidden_side_app_instructions.pdfIn PDF document text
    • http://buwiguliri.iblogger.org/22498865628.pdfIn PDF document text
    • http://gnoogle.site/how_to_enter_code_on_liftmaster_keypadp0c1a.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/gWhgidg/medepapomazuruzuzo.pdfIn PDF document text
    • http://olx-delivery.cc/59215893361j6f3p.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/rirusozo/90746502365.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/reformas_borbonicas_militar_resumen.pdfIn PDF document text
    • http://beninoduvewer.epizy.com/xuzerep.pdfIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_438f27d001594b7db9720868c8f0a84d.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_ca8d338ba29044fe97c29b870014c69e.pdf?index=trueIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_a44df4e2e8d14c68a98aa061cebcaa99.pdf?index=trueIn PDF document text
    • http://zenujasope.epizy.com/48455271817.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/scheming_through_the_zombie_apocalypse_guide.pdfIn PDF document text
    • http://kebanibaru.epizy.com/lujosowaxanususefono.pdfIn PDF document text
    • http://xisapedugifado.epizy.com/coupon_template_psd_free.pdfIn PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_f8db4b0f6ce84efd989f5bf6b2edc1fc.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001033f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033F 5224 bytes
SHA-256: 2d2483e8598b8584b56db81d694be745122a69782cc1c4eb77a82ada2385c832
font_01_sfnt_off000114e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E6 11984 bytes
SHA-256: 050f7e7ece59276a472bc36211a3c0bde9dc12139c7a2112ce8e93603377fc4a
font_02_sfnt_off00013dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC4 6048 bytes
SHA-256: 633c2867c7c61040593bae6fdd68008a96359bd28d057f714a057e09c9df57af

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