Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd592c1430f6588…

MALICIOUS

PDF

78.5 KB Created: 2021-03-20 21:35:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d27780db496ea638be5c40971f89f222 SHA-1: 163ca8b9a1f989da41701eb0a5f7b2eddfaebe52 SHA-256: 5bd592c1430f658884e8d97144fa19ae54b712422e2b962ae824e27271634409
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users. The document body, though partially corrupted, references a search query for 'best android phone', aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/123?utm_term=best+android+phone+2019+under+20000+philippines PDF link annotation
    • http://d-youtube.com/krtler_pkk_ve_abdullah_calan91cad.pdfIn PDF document text
    • http://mangalvpodarok.ru/16529944362eis1x.pdfIn PDF document text
    • http://kabuzajo.22web.org/puvera.pdfIn PDF document text
    • http://stickerrus.ru/xabewemegorajegojuzpfmn.pdfIn PDF document text
    • http://healthyforczechrepublic.site/price_of_stihl_ms_180mb8sb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481515/normal_5ffce53286cf2.pdfIn PDF document text
    • http://stankovit.ru/what_are_the_6_rules_of_exponentsg285g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_6028714bdcc78.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/436049501106k2mq.pdfIn PDF document text
    • http://creditscorefix.info/peduwopumesulojeponiglf8e6.pdfIn PDF document text
    • http://zhk-rekord.info/trigonometry_formulas_non_right_angled_triangles0xd9q.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/defikukimemuzeftx1n.pdfIn PDF document text
    • http://fenellalucynelle.info/what_is_the_price_of_smart_watch_in_indiagiezg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lufivut.rf.gd/15793039727.pdfIn PDF document text
    • http://rivelik.epizy.com/free_website_templates_for_dreamweaver_cc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e953ac5-b162-4573-a0e4-93509abab189/99891138472.pdfIn PDF document text
    • http://wavudipikudela.epizy.com/29368796537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c08088a-9e07-4f4e-891b-c55d68f68e0b/index_imperium_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88107a7-42fe-46c8-8ddb-49034b7406cb/lg_spirit_4g_lte_phone_case.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d89fdeca-9aff-4b2e-baba-c850df3dcabf/fourier_analysis_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e296606f-a87a-4104-9a4f-91ce4fde0bf7/vokeket.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_off0000e599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE599 5460 bytes
SHA-256: 8b79e779337e963f7d3220fa766f84e238922320c01615437f3da1dd8974f1f4
font_01_sfnt_off0000f817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF817 11272 bytes
SHA-256: b230c03c92e17df5ffc499ed7d9bb54ad160a3c3b2ae9b3356b90e57dab14165
font_02_sfnt_off00011e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E03 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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