Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea0237a207134f1…

MALICIOUS

PDF

84.0 KB Created: 2021-03-23 09:15:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 448d51ad68b03c23ae6b4cae32e9a2fe SHA-1: b17ba39925c13668c71f5ee251a6e86908a73a95 SHA-256: 8ea0237a207134f16768bfb07975299d299df636cfff511cc7a854d6505d5751
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'vilenefex.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to 'Vue js tutorial point pdf'. No scripts were extracted, but the presence of external URIs and the overall heuristic firings indicate a malicious intent to redirect the user to a compromised site.

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://vilenefex.ru/award?keyword=vue+js+tutorial+point+pdf PDF link annotation
    • https://cdn.sqhk.co/zupitefa/jficvgO/lepoxezotukazajebuguz.pdfIn PDF document text
    • http://bofoduweb.22web.org/96115381053.pdfIn PDF document text
    • http://sewulege.22web.org/94572812207.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/iAjeU7h/lobotomy_corporation_queen_of_hatred_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/Lgchhhf/led_controller_with_rf_remote_control_app.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/m6P9Bmj/damp_proof_course_guidelines.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/4917fd78-dacd-41a8-858f-d473a9ecb245/kagaludotemepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb870671-518e-4c2b-b172-2d46940d2bc0/mito_definition_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/buell_lightning_xb12s_service_manual.pdfIn PDF document text
    • http://desakoda.rf.gd/kabevuworewopekovu.pdfIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_d53270f3a8804031b6b474f22b2cd1d6.pdf?index=trueIn PDF document text
    • http://gizugutopaf.epizy.com/broken_wings_book_by_andrea.pdfIn PDF document text
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_eb7c871a043d4ec4bb66adc91f20dcb8.pdf?index=trueIn PDF document text
    • http://dafitigare.epizy.com/gedenobagamap.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/72938049539.pdfIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_4974bc3b2c4e4c70b7d3a444914ceaaa.pdf?index=trueIn PDF document text
    • http://mevanuzexujen.rf.gd/algebra_2_test_chapter_2_answers.pdfIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_61e952681772470ab446a6786f7bc4ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tevigotu/89358384622.pdfIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_7344098f76fe4f2da841f8b6690de17b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d734da2-58ee-4bee-9530-3860a5580886/luputonazatevaxatofekov.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 5076 bytes
SHA-256: f6df2e101e6f84058e133a601466431cf51a16c901f4af1c01305b8e77048096
font_01_sfnt_off0001114e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114E 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000119dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DC 11924 bytes
SHA-256: a73075fddc934191e36f4daee6d5153a37b89f16669cc81eb25c86c8db2f01bb

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