Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f1126b7f074110…

MALICIOUS

PDF

80.2 KB Created: 2021-03-31 01:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7215eb5298f1f84fb6e00c6820ff178c SHA-1: 5a68ea835ef78575db736df77594ade1f1c03fd1 SHA-256: f0f1126b7f0741100c4524ea002197bd8982eff77b0f42e68687da44f9420746
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9995

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 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.
  • 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://crophysi.ru/award?keyword=bisection+method+algorithm+pdf PDF link annotation
    • https://figusemaf.weebly.com/uploads/1/3/2/6/132682639/631768.pdfIn PDF document text
    • https://butiriretife.weebly.com/uploads/1/3/2/6/132681404/gonigonixivowos-sezudeviwi-guromibimelebed.pdfIn PDF document text
    • https://cdn.sqhk.co/reposivekow/hetgdhh/metal_slug_3_cheats_download.pdfIn PDF document text
    • https://cdn.sqhk.co/novozefox/UVZgfEp/eden_park_auckland_weather_report.pdfIn PDF document text
    • https://dixoparogazasa.weebly.com/uploads/1/3/1/8/131871726/vopubizirojij_xegaguso_jususupuk_japamaxomatoji.pdfIn PDF document text
    • http://paxenazubenib.mygamesonline.org/how_to_program_a_ge_universal_remote_to_directv.pdfIn PDF document text
    • https://cdn.sqhk.co/sapidefapo/nFxjgDp/39536267197.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/hdHicXv/personal_assistant_job_description_and_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/gidieid/begexukexo.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/carrefour_laval_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/inequality_worksheet_gcse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d5b9873-257a-40d2-bbb2-091bccbdedd8/4775497333.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/dizisimos.pdfIn PDF document text
    • http://kibagog.onlinewebshop.net/statistical_analysis_in_excel_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/suxonenixes.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/barbell_upright_row_exercise_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/netflix_hack_app_apk.pdfIn PDF document text
    • http://sasaxunofob.atwebpages.com/gumabubofoxavir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93198a51-7458-4e4c-ba9f-38de820e550e/56982212333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca931333-6875-4be3-90fa-79479c0b49f7/metforas_de_la_vida_cotidiana_lakoff_y_johnson.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/jiselufegeliwezeduziro.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/islamic_history_of_spain_in_urdu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 5616 bytes
SHA-256: f099a9fd79169a0b8ac8b1157c52f0699c24f322d2e121ea426f65b264f0a277
font_01_sfnt_off0000f6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E5 11444 bytes
SHA-256: a6e4220fc6cd20b70bfcf8cf368ff5197e953ebabe286f03fc248557b0744c64
font_02_sfnt_off00011e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0E 16144 bytes
SHA-256: fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78

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