Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3b8dd26d644ecc…

MALICIOUS

PDF

73.7 KB Created: 2021-03-20 19:35:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8294574b557b97f6fa733e7f20d4fc46 SHA-1: 9b9d8408bfee7dd08f7bd00aa7d6ca2b678409e3 SHA-256: 1b3b8dd26d644ecca6a07589260add23ba8429dc01fd859d806d66012bfcb096
126 Risk Score

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 0.9956

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://baarspo.ru/award?keyword=undergraduate+commutative+algebra+pdf PDF link annotation
    • https://cdn.sqhk.co/lewulula/dheVgf4/kizinojisinop.pdfIn PDF document text
    • http://wavakuxakuxom.66ghz.com/baby_shoe_size_guide_by_age_uk.pdfIn PDF document text
    • http://natur-green.fun/operations_management_degrees_onlinec62ia.pdfIn PDF document text
    • http://tikovg.xyz/lycoming_0-320_overhaul_cost_australiap9khe.pdfIn PDF document text
    • http://reduslim-siteofficial.site/60852983706rep7o.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/bPhaPK8/coloring_pages_for_adults.pdfIn PDF document text
    • http://kernig.store/92190875328jabz8.pdfIn PDF document text
    • http://milano-moda.space/61133466201qbwei.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/gaFJijb/pk_xd_mod_money_2020.pdfIn PDF document text
    • http://bestita.space/best_windows_launcher_app_for_androidsvrvv.pdfIn PDF document text
    • http://volosaty100.xyz/9089075984xeaf8.pdfIn PDF document text
    • http://jigitozunawada.66ghz.com/what_are_different_words_for_emotion.pdfIn PDF document text
    • http://atomyimperial.ru/zadixajy3n0h.pdfIn PDF document text
    • http://xteenware.online/39419363511spmgw.pdfIn PDF document text
    • http://depupejaxidolip.22web.org/akuntansi_sebagai_sistem_informasi_kelas_12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fefomopopokelo.epizy.com/kirby_battle_royale_free.pdfIn PDF document text
    • http://banobozibijur.epizy.com/70129198219.pdfIn PDF document text
    • http://kamagudos.epizy.com/calendar_crestin_ortodox_stil_vechi_2020.pdfIn PDF document text
    • http://tikikenuf.epizy.com/xamupibexid.pdfIn PDF document text
    • http://momerulazem.rf.gd/osha_10_hour_construction_course_answers.pdfIn PDF document text
    • http://kotidaw.epizy.com/alone_together_full.pdfIn PDF document text
    • http://mibofive.epizy.com/the_fabric_of_the_cosmos_space_time_and_the_texture_of_reality_by_brian_greene.pdfIn PDF document text
    • http://mepaduk.rf.gd/7621767043.pdfIn PDF document text
    • http://pujusojup.epizy.com/buffalo_soldier_full_song.pdfIn PDF document text
    • http://metusajixano.epizy.com/burden_saxophone_free.pdfIn PDF document text
    • http://lepetape.epizy.com/97841801273.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_off0000df33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF33 5488 bytes
SHA-256: 986ba67cb23b5fb58a6990cf9a008ff39f36a754256e6e54736f3eda905518b8
font_01_sfnt_off0000f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 11708 bytes
SHA-256: b602f87d711f73f0a7014b88a8131c2a6d3d2ef834ebd70b7b9a5a6cf75cadb4

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