Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f180a96f68b573…

MALICIOUS

PDF

78.7 KB Created: 2021-03-24 14:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1f686b92b2c6cdc97dfbf15a5a22f4b7 SHA-1: e57623afa310e913dac4ba89f105ada467d52bfc SHA-256: 28f180a96f68b573227dfe7d8699a22e452a60c2f60948ce91b1cae5104f5f29
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to `maypoin.ru`, suggesting a link farm or redirection mechanism. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the high risk score indicate an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=jrotc+let+manuals PDF link annotation
    • https://cdn.sqhk.co/kedezoge/jeGAQhe/97447409432.pdfIn PDF document text
    • http://xuxodowenam.getenjoyment.net/algebraic_expression_worksheet_for_grade_6.pdfIn PDF document text
    • https://cdn.sqhk.co/gajalalike/jieijii/democracy_3_policy_guide.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/mtd_46_inch_mower_deck_parts.pdfIn PDF document text
    • https://sotivozorome.weebly.com/uploads/1/3/4/7/134733800/malomawelole.pdfIn PDF document text
    • http://kodavuviguwu.mypressonline.com/22999474039.pdfIn PDF document text
    • https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/a08210.pdfIn PDF document text
    • https://wurixexaf.weebly.com/uploads/1/3/4/8/134865586/af5237d8f.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/nj6puP7/cowbellpedia_2017_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/geoicO5/susiw.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/fugodafulurutaxisepev.pdfIn PDF document text
    • http://laserisesiseno.getenjoyment.net/bissell_green_machine_instruction_manual.pdfIn PDF document text
    • https://vosanodamenero.weebly.com/uploads/1/3/1/4/131438282/mopiwe.pdfIn PDF document text
    • https://wegekasi.weebly.com/uploads/1/3/4/6/134678838/a4f3ccf8ca.pdfIn PDF document text
    • https://cdn.sqhk.co/zubejavaxuvu/cXgieIm/here_i_go_again_2020_remix.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/ede127be-1733-47e5-b964-e2dffd0f57ef/blackdecker_dustbuster_16v_lithium_hand_vacuum_chv1410l32_reviews.pdfIn PDF document text
    • http://nibubatovavav.atwebpages.com/what_is_human_geography_ks3_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592f1e1f-70d2-45c2-8784-bb04af9cd48f/wapupi.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/25449199913.pdfIn PDF document text
    • http://baletax.onlinewebshop.net/17712663133.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/mathematics_books_for_class_2.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/how_can_i_have_a_strong_relationship_with_god.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_off0000f67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 4936 bytes
SHA-256: 9a64ea842b302500159da6bec951ddd244323bc124284b7ec1d950beafa2c65f
font_01_sfnt_off00010725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 11236 bytes
SHA-256: b1c22d9b7008c89e6a4db699a5b476ee72aabc28fca8a70d0adc4c4a721c0347

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