Malicious PDF — malware analysis report

Static analysis result for SHA-256 898feabcdc73883f…

MALICIOUS

PDF

74.5 KB Created: 2021-03-20 15:17:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 050cf6a3eeb931d28f9257c5dc5ba74c SHA-1: e266b876ada78d1bbb173809a83373cf473192a7 SHA-256: 898feabcdc73883ff8dbc1c04f54c9cfa3b68d0d96671762f36c7a522a683efd
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or malware distribution document. The presence of numerous embedded URLs, including one hosted on a disposable domain, suggests an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://ecoservice-vlad.ru/tujajifonuxutegabifusjwv1w.pdf In PDF document text
    • https://cdn.sqhk.co/sedazozesufu/hdhaLjd/sims_4_doctor_career_illness_guide.pdfIn PDF document text
    • http://energierecrute-emplois.com/94450190384et8rv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426410/normal_5fe40dea7684c.pdfIn PDF document text
    • http://idealica-co.site/aviation_weather_services_study_guideqpxrt.pdfIn PDF document text
    • http://makamar.tech/67471498008vomz2.pdfIn PDF document text
    • https://cdn.sqhk.co/silijebutu/ha6geje/north_star_dodge_chrysler_jeep_san_antonio_tx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413239/normal_5fe59b87b85ff.pdfIn PDF document text
    • http://1ux.site/rutina_de_ejercicios_para_aumentar_masa_muscular_en_casa_con_mancuernas1203y.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/bgTajsb/guide_for_pk_explore_universe_tips_and_tricks.pdfIn PDF document text
    • https://cdn.sqhk.co/palezubifo/hdYhghf/hazardous_air_traffic_report_database.pdfIn PDF document text
    • http://fullpisetc.ru/ventajas_y_desventajas_de_inventario4ualr.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/jbojhiw/fiwawum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377095/normal_5fdd957397770.pdfIn PDF document text
    • http://trikotoria.ru/linevonubipiduremo98j1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/n4t4wXRn-MA/wb?keyword=how%20to%20fix%20a%20heat%20pump%20compressorPDF link annotation
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_0980c9ac274e496a98c80160eb82ad49.pdf?index=trueIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_1fd12dd5fc6e40c7964d57858dbba422.pdf?index=trueIn PDF document text
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_7513bbd1e688472ba432f84291304b3b.pdf?index=trueIn PDF document text
    • https://21dbc830-6d60-48ad-8ab0-00d2b3cb69e0.filesusr.com/ugd/18d949_e930ddbbe4464d04a23193fc0a937217.pdf?index=trueIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_510e5539f6534c48b6efbf9b610f7753.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D4 5344 bytes
SHA-256: 00168e8b6b450c501e8192d87e8fcc1ab1d88c05a4173e904383ac431418c781
font_01_sfnt_off0000f9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 10160 bytes
SHA-256: bfc335728bf7cd658816a7e30d38b2ccdd37f599ba8706e7b11aa6a388ec7d78

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