Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d714061a7339a21…

MALICIOUS

PDF

81.9 KB Created: 2021-03-14 03:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aafd5f53d09e26b194e959022ccdc9a3 SHA-1: 2539d43227709183537fa6d91fb6aa02a538d3a8 SHA-256: 2d714061a7339a217740ae7372e1ea5a92eb5241e4954e8698c52bf36f735edd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content, but the presence of external URIs and the link farm heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/123?utm_term=bebe+rexha+back+to+you PDF link annotation
    • http://tortomsk.ru/alain_badiou_mao_zedongic2tn.pdfIn PDF document text
    • http://bujasap.iblogger.org/13642763850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476758/normal_600f86cc10a31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407060/normal_5fe52d2dc52f0.pdfIn PDF document text
    • http://inscarusa.info/vygotskys_educational_theory_in_cultural_context_citation70ahx.pdfIn PDF document text
    • http://bamuwapinofaro.iblogger.org/does_netflix_have_discovery_of_witches.pdfIn PDF document text
    • http://hookup673.site/pokemon_giratina_strikes_back_legendary_locationsvl6r0.pdfIn PDF document text
    • http://natfreshik.fun/how_to_make_xbox_live_account_on_xbox_360awwfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444623/normal_601486b90e3e1.pdfIn PDF document text
    • http://topijakalez.22web.org/list_of_abbreviations_for_measurements.pdfIn PDF document text
    • http://sazaleve.22web.org/akaike_information_criteria_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://talaxevavilur.rf.gd/lettering_templates_for_applique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833bc061-41e3-4235-b225-8b11045d710f/how_to_turn_on_mic_in_fortnite_ps4_without_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429f1833-599b-43f6-ba77-5bb34b4554bc/what_protects_us_from_the_harmful_ultraviolet_rays_of_the_sun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653522b2-4f00-4c0a-9d67-839246409241/buscar_informacion_sobre_el_aprendizaje_basado_en_proyectos_abp.pdfIn PDF document text
    • http://xukenefurirog.epizy.com/ms_access_data_form.pdfIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_d15ab298743544b694e726d9dc5ade6c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7b1655a-e0cf-43d6-8522-a34e389bd544/craftsman_10_sliding_compound_miter_saw_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba33f4b-9dc1-4a50-8b31-4ee58ef8cf52/81112429030.pdfIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_128c7c1c9b054e18b8c7b3b540d8815d.pdf?index=trueIn PDF document text
    • http://rosekoratuxi.rf.gd/bbq_company_de_downloads_grillseminar_basic.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_725e080f978a4f5e8f157bec904b1b93.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF256 5100 bytes
SHA-256: 21998a2782ac3f17c58a3200e9e5753a549bfbe1b0bf8e4ee67b75704e3d7ff1
font_01_sfnt_off000103b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B3 3648 bytes
SHA-256: 9c02b11fc8cde08c07201a00a6f4970f920e2d1dc1ca2935499af9862e5da114
font_02_sfnt_off0001120f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120F 11684 bytes
SHA-256: 68dbbc6607d6eb538b277978eaa94178ce1703cd88d5921e9e2e0a1cfd0353a9

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