Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a2c409d962c4b8…

MALICIOUS

PDF

77.0 KB Created: 2021-02-25 22:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 25dc9772218d034e79de89bf1fd1eaca SHA-1: 7f0419066758c28ea91612a6460b88938d1f3aee SHA-256: 96a2c409d962c4b87eb3adfb731a816e81001b4c044412522a97f7bf77d78509
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF structure and embedded links are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/123?utm_term=frigidaire+50+pint+dehumidifier+filter+cleaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392651/normal_5fea3b7988630.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457881/normal_600035c81735e.pdfIn PDF document text
    • http://shoop-ff.ru/experience_certificate_format_for_electrical_engineerpclhn.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/what_is_the_nypd_physical_test.pdfIn PDF document text
    • http://tekirivira.iblogger.org/66591352223.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/bissell_proheat_2x_healthy_home_pet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460449/normal_5fc951cf8cae9.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/32056520172.pdfIn PDF document text
    • http://fefikaniki.22web.org/nivewo.pdfIn PDF document text
    • http://xekusevaguviz.iblogger.org/simile_metaphor_worksheet_4th_grade.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/how_to_put_jlab_in_pairing_mode.pdfIn PDF document text
    • http://vk-settings-change.online/meluvuriwobofimrg14i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rewezaxow.epizy.com/adobe_reader_portable_version.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/medicare_benefit_policy_chapter_6.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/13001192774.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/kazurenivip.pdfIn PDF document text
    • http://lokutoge.rf.gd/atm_cell_format_in_computer_networks.pdfIn PDF document text
    • http://dululelafekupas.rf.gd/bagiduzanusir.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/rijobofutuzu.pdfIn PDF document text
    • http://kudikixaxalen.epizy.com/73040912998.pdfIn PDF document text
    • http://wotixebapaxuwug.rf.gd/icloud_photo_sharing_full_resolution.pdfIn PDF document text
    • http://ledivalefinaba.rf.gd/segimudifuxoxifete.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/at_t_u_verse_channel_guide_milwaukee.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 5612 bytes
SHA-256: 8aa9dc30677c26a110282bfe0dfbbf920de62393249ffd288b52bf34afc56315
font_01_sfnt_off000102d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D8 10360 bytes
SHA-256: 80003826a06d7a50e4ed6ff9685536e292556eef53cc95e8b7775d5b1b0793da

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