Malicious PDF — malware analysis report

Static analysis result for SHA-256 4074c7ceb643249a…

MALICIOUS

PDF

79.7 KB Created: 2021-02-28 06:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 41b0f0a600a4cc59746f05b29a9ff3e2 SHA-1: a0e985d543fa847bc8fd449fd6bf994654625109 SHA-256: 4074c7ceb643249a2ebf682324e628203e00da830cb5b8fdb264d49e9657a54b
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically targeting a search query related to 'bluetooth speaker'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/award?keyword=my+bluetooth+speaker+keeps+turning+off PDF link annotation
    • https://nimimetifav.weebly.com/uploads/1/3/2/8/132814674/winevewunip.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/7R2rBEI/wedding_dresses_stores_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/hfgcupx/the_solar_system_song_hopscotch.pdfIn PDF document text
    • http://kozodomu.22web.org/max_lucado_quotes_on_peace.pdfIn PDF document text
    • http://erkutungotu.com/vilogefidukaliwid7nz.pdfIn PDF document text
    • https://deremorukoj.weebly.com/uploads/1/3/4/4/134490203/dakatidov_puzusebuxizeg_gevas.pdfIn PDF document text
    • http://citrus-fruit.space/wow_armies_of_legionfall_rep_guide1i1qk.pdfIn PDF document text
    • http://italywow.pro/33159153156hdy0g.pdfIn PDF document text
    • http://lnstagram-office.com/risk_game_of_thrones_skirmish_edition_regole_italiano19mqo.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/99257494210.pdfIn PDF document text
    • https://cdn.sqhk.co/lusikagidet/Djehfge/medical_assistant_jobs_near_me_indeed.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/how_to_lose_weight_fast_with_indian_diet.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/average_salary_for_graphic_designer_in_chicago.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujuvisesakok.myartsonline.com/83431293835.pdfIn PDF document text
    • http://tikomiwewo.atwebpages.com/ejercicios_agudas_llanas_y_esdrjulas_4_primaria.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/nigibidu.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/gunujufuduponunakigupofo.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/stihl_fs_85_pro_carburetor_adjustment.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_off0000fa88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA88 5472 bytes
SHA-256: f794a5c7c05e3492c7861b7e4d7139c0a399b7ccfaf7166274a7d431b9b04bd2
font_01_sfnt_off00010d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 10612 bytes
SHA-256: 553ef0a0b451464b9ba0b68857e603f74ae4fc805bc6f1e97dc9899408153890

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