Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be43c99d965aa95…

MALICIOUS

PDF

162.1 KB Created: 2021-05-16 09:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: dde85ca4124881e748376bcc7c007d79 SHA-1: 2dcfd32629a704325ee13c2e953e0fcfb41edb8b SHA-256: 9be43c99d965aa95ae8b8fcbce4b0c95f971321f02e9f730439b9340efe59d5b
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to search queries and application metadata, further supporting a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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://kuzutuzo.ru/strik?utm_term=what+is+the+electronic+stability+control+system+designed+to+do PDF link annotation
    • http://bibuzikufaje.mygamesonline.org/binary_options_trading_ebook.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/epistaxis_etiology.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/st_francis_retreat_house_easton_pa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_60131829d3c23.pdfIn PDF document text
    • http://legexebe.medianewsonline.com/gaxopemutiditup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_600ea75f6ae7e.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/toxicity_of_anticancer_drugs.pdfIn PDF document text
    • http://raxewapikeb.mygamesonline.org/sazarufej.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/blanchard_macroeconomia_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_606bc3da6e6b2.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/metafisica_aristoteles_libro_4.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/87346315066.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b3e911-ea44-4dec-af1f-177326e1bd8f/puma_air_compressor_pk6060v_parts.pdfIn PDF document text
    • http://jewofeket.onlinewebshop.net/acheminement_vers_la_parole_heidegger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/614edf4d-dfef-49d2-83cc-cfc52ed768eb/520208376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff27e848-ad11-4210-81fa-3d9e4843cf48/dyson_small_ball_allergy_upright_vacuum_cleaner_review.pdfIn PDF document text
    • http://pezefaxovojole.atwebpages.com/ciclo_de_vida_do_schistosoma_mansoni.pdfIn PDF document text
    • http://kubomefewofumim.atwebpages.com/gokugadosibanuxug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a3465c-2959-43fb-93b6-2ba2001e18a5/bifafaxusawexenudel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c092686a-07ce-4f15-8f5e-56be3d200a05/shark_lift_away_deluxe_loss_of_suction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6369acb-bc7d-498c-abf3-852caba0188f/weather_map_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e03a2f-3b8a-4b98-9ba5-583448adfa74/xakemifibivebalududin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d86da00-2ec1-45e3-828c-74284e79a0c9/95906775522.pdfIn PDF document text
    • http://birukuf.onlinewebshop.net/aashto_green_book_2020_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a2e01b-42bb-4fd9-8272-b6bae518d75b/pufezunafupetogesilo.pdfIn PDF document text
    • http://wepunulirepobi.myartsonline.com/28587025010.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E07 5608 bytes
SHA-256: 16290d21a226e6d438df6deb4af31ffd34dcaea795add6342eb142982dc1c85a
font_01_sfnt_off0001a0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0F7 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0001ac58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC58 58220 bytes
SHA-256: 656dcd754c180824892e45ceb5dcb663e94f9df6cd82dab5104e4a0421082f90
font_03_sfnt_off00021876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21876 10952 bytes
SHA-256: b8828f6fe8bdeff7b2962b5082fb1bfad19984e08e43b4561b726449a3166129
font_04_sfnt_off00023c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23C36 19868 bytes
SHA-256: 30141c6d6dd4615d20f509d4d8c5ee1536e428cad2125e1aaa04b333ec91d06a

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