Malicious PDF — malware analysis report

Static analysis result for SHA-256 036c4250b5277563…

MALICIOUS

PDF

80.7 KB Created: 2021-03-25 00:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 962136fd73f114fd6966a4e657fb41ed SHA-1: 99c80e518c8564cb718c701efc57ba2aeb18cdf4 SHA-256: 036c4250b5277563eec7868c83c54ae19bc1e78b2dd19ffe751038dff2e35f34
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous external URIs, with at least one heuristic identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs further supports the attack pattern of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 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://gimoguvi.ru/award?keyword=abscesso+periamigdaliano+pdf PDF link annotation
    • https://cdn.sqhk.co/bapulofuw/ghpibXi/age_structure_diagrams_apes_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/2fjdugc/candomble_religion.pdfIn PDF document text
    • http://easterthjg.com/zobevaxh82zf.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/2gftn2x/girls_fashion_design.pdfIn PDF document text
    • http://kufomabid.mywebcommunity.org/70883825756.pdfIn PDF document text
    • http://zedakobogesa.mypressonline.com/molorikazijidutux.pdfIn PDF document text
    • https://cdn.sqhk.co/gijosevozu/ih7Qghj/vr_movie_theater_free_download.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/define_classical_conditioning_theory.pdfIn PDF document text
    • http://cpskras.website/fogelewune4mm6i.pdfIn PDF document text
    • http://gigurokubi.66ghz.com/comparing_unlike_fractions_worksheet.pdfIn PDF document text
    • http://vezukugijisepo.scienceontheweb.net/important_english_words_used_in_daily_life.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://refusunono.onlinewebshop.net/what_is_a_minimal_set_example.pdfIn PDF document text
    • http://mefilitatiwad.epizy.com/algebra_exponent_rules.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_e5699356a6574963957b71e39097cd10.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/mpi_container_log_sheet_2018.pdfIn PDF document text
    • http://gabamad.epizy.com/72440107098.pdfIn PDF document text
    • http://xamufalifab.epizy.com/nesef.pdfIn PDF document text
    • https://97e6e6c8-040d-427c-ad66-6ef02350ae38.filesusr.com/ugd/9c523c_d7005a1735444906bbc03acdfdf5d776.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rotowan/archicad_16_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/which_is_an_example_of_a_deep_level_of_processing.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_8f468425cb2b4170aa5aab9770aa1607.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/24327632807.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/how_to_do_discourse_analysis_in_qualitative_research.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A4 5604 bytes
SHA-256: 80dd03759a12481237fd057fd1eaaf11deb70fb7f4586d85c8e06feb4946b3fa
font_01_sfnt_off00010a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 14136 bytes
SHA-256: e08e1e442778136d1af516386bc93f6d105ba5f4820978207489c5bc8c63b3e5

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