Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec76e8185735727…

MALICIOUS

PDF

163.5 KB Created: 2021-03-20 23:26:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c49351bc28203cda9b3b143dde903732 SHA-1: eba19652e71cffc662369b071155015e45f5921d SHA-256: aec76e81857357273f6305dde1fb3267d9f6a53906134a4995d4bd082ad49602
126 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism for phishing or malware distribution. The presence of external URIs and link farm heuristics strongly supports a phishing or malicious download attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

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://vilenefex.ru/award?keyword=catholic+biblical+theology+pdf PDF link annotation
    • http://dinewegivogofe.mygamesonline.org/kuvewopepabejixikabir.pdfIn PDF document text
    • http://wisecredit.info/davejudegobitopebiwoxalow8k6wl.pdfIn PDF document text
    • http://morj.space/569344228552pwd4.pdfIn PDF document text
    • http://24goodstore.site/75934908583og5yy.pdfIn PDF document text
    • http://zatoboyvibor.fun/garmin_nuvi_2597_maximum_sd_card2s4wg.pdfIn PDF document text
    • http://distornyup.site/beginner_harmonica_sheet_music_freer2dsg.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/28652628473.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/rQij5ib/44288253223.pdfIn PDF document text
    • http://pr-bux.online/suzuki_piano_book_30gmq9.pdfIn PDF document text
    • http://suzupuwejal.mygamesonline.org/unidad_1_etapa_2_ws3_answers.pdfIn PDF document text
    • http://4escam-bot.online/nagozagitimufetik6yyof.pdfIn PDF document text
    • http://fowagovujag.22web.org/31266399149.pdfIn PDF document text
    • http://jofarofuwudeveb.66ghz.com/fexow.pdfIn PDF document text
    • http://pinenud.mygamesonline.org/calidad_del_aire_medellin.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/beginner_strength_training_routine_no_equipment.pdfIn PDF document text
    • https://cdn.sqhk.co/juvowisire/9W9gf1F/ohio_real_estate_appraiser_license_renewal_form.pdfIn PDF document text
    • http://kmplitka.shop/sifokoq4vi.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/3HLkknH/fun_race_3d_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/RIr2Ihj/gotajezemigoturepozinewel.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/346de037-63ad-4502-939a-05198c199836/92715645236.pdfIn PDF document text
    • http://gitavini.epizy.com/vavosemijowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95010247-cb7f-439a-bcc4-0b0a089b894e/kali_linux_root_password_2020.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2065531-e7ca-4b98-a7e9-de8ab8984812/sword_art_online_novel_ending.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/kojoputozam.pdfIn PDF document text
    • http://lugogugur.rf.gd/radical_candor_executive_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f32d191-3d06-456a-8dc4-b548701b578c/pemamega.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_off00024688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24688 5288 bytes
SHA-256: 00d877bd4f8f7f72dfe04b3a2eef286b3675a30a683716c2ce37ecaa7a40b924
font_01_sfnt_off00025889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25889 11788 bytes
SHA-256: 1999f06c570af5847f40b6ac67542284f5aade40a5d46140b053aeb9de2c4356

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