Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6bdc1433555e33…

MALICIOUS

PDF

78.3 KB Created: 2021-04-07 14:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2f6b83b90d84fa0bbae76090740b0b71 SHA-1: bd78b298b8b4f0333f1d7d55f86597420c88d1d1 SHA-256: 9b6bdc1433555e3378087ff067a349a973558b3506087117ea592c542a7649ad
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://gimoguvi.ru/123?utm_term=atma+full+form+in+management PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489251/normal_60479d0c4b5b3.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/cAhhifo/alien_clash_of_clans.pdfIn PDF document text
    • http://neojust.ru/859231438943jlym.pdfIn PDF document text
    • http://rezltml.xyz/air_force_civilian_leave_request_form7a70m.pdfIn PDF document text
    • http://nogefoxezegu.22web.org/is_nasm_exam_open_book.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/hd18jfB/hungry_shark_heroes_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/jhbhjgj/vejafugiditar.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/1ibjcNt/life_is_strange_chloe_and_max_sequel.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/cLDP7jf/81014338906.pdfIn PDF document text
    • http://jilet2.club/bogan_movie_bgm_tonesarva2.pdfIn PDF document text
    • http://muwilagugo.iblogger.org/viper_5701_replacement_remote.pdfIn PDF document text
    • http://viputixezererej.66ghz.com/santa_cam_letter_printable_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_60618761712ed.pdfIn PDF document text
    • http://ellmax-site.xyz/imperative_verbs_worksheet_year_41i5nf.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/hehjcjg/rivomagurumo.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/UOXhioY/12616678933.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gamojeliziri.rf.gd/literary_devices_gcse.pdfIn PDF document text
    • http://rinebamade.epizy.com/emulator_app_for_pc.pdfIn PDF document text
    • http://buweweja.epizy.com/center_worksheet_excel_print.pdfIn PDF document text
    • http://wexapunotuvegu.rf.gd/pejuxiziruvujidufojus.pdfIn PDF document text
    • http://mafavijudewu.rf.gd/21894188320.pdfIn PDF document text
    • http://bekabugi.epizy.com/ishq_wali_baarish_whatsapp_status.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_off0000f649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF649 4900 bytes
SHA-256: 1230c50361c8f1f193cd5712cb693dc76394632085d543a718a86cfe7af0d16c
font_01_sfnt_off000106dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DD 10752 bytes
SHA-256: f2717d2aa33dae2d8e5729312d0c752afa5f55f959f0beca4bd4f31c9b35b1e9

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