Malicious PDF — malware analysis report

Static analysis result for SHA-256 890ed408b43bb68d…

MALICIOUS

PDF

81.7 KB Created: 2021-03-22 09:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 446bbdd42f384b9888b471092a7eafb8 SHA-1: b5235d249d0f2161d6428b3234be0230c3c09c36 SHA-256: 890ed408b43bb68dbb7b2fe78051d9cad95e1c783f449772e78e5f881153a7af
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 0.9997

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://druttle.ru/aws?utm_term=girl+with+the+dragon+tattoo+imdb+swedish PDF link annotation
    • https://cdn.sqhk.co/navotezive/fBggxif/cambridge_a_level_maths_past_papers.pdfIn PDF document text
    • http://lodijijewotiviw.iblogger.org/ap_grama_ward_sachivalayam_notification_2020.pdfIn PDF document text
    • http://vowuzemiru.medianewsonline.com/lodevetikuletoris.pdfIn PDF document text
    • https://cdn.sqhk.co/budijapa/hjgfkjg/76739980346.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/fxzqFgh/aquarium_fish_trap_canada.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/nuxamalavabati.pdfIn PDF document text
    • https://cdn.sqhk.co/bogabixexuja/gcjexBq/24213479990.pdfIn PDF document text
    • http://lewoluxadet.iblogger.org/pharmacology_books_for_medical_students_free_download.pdfIn PDF document text
    • http://gewewenaso.iblogger.org/femabifufed.pdfIn PDF document text
    • http://gesajobode.22web.org/cowboy_chicken_menu.pdfIn PDF document text
    • http://xelinuruziv.iblogger.org/terapi_acne_vulgaris.pdfIn PDF document text
    • http://reveruxoxobeve.22web.org/medical_fitness_certificate_for_visa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/galinikagopit/hepatoma_diagnosis_guidelines.pdfIn PDF document text
    • http://nibewisule.epizy.com/attribution_modelling_in_google_analytics_and_beyond_download.pdfIn PDF document text
    • http://wuwejujadabatej.rf.gd/what_is_the_cost_of_generac_generators.pdfIn PDF document text
    • http://pofutujasex.rf.gd/do_school_subjects_need_capital_letters.pdfIn PDF document text
    • http://jibitolokadidus.rf.gd/16129303276.pdfIn PDF document text
    • http://bulalejovadidov.rf.gd/beach_buggy_racing_hack_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/best_horror_movies_in_telugu_free.pdfIn PDF document text
    • http://kavunuses.epizy.com/criminal_case_game_hack_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 5292 bytes
SHA-256: 33d650c879c47658ae748c63eafb93cd0893948e8b70f12d959566c2e8a8c08e
font_01_sfnt_off00010194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10194 12744 bytes
SHA-256: 85313126573a7ebd307df1588d6daf70bca7423858387364c652bb1ff190594a
font_02_sfnt_off000129c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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