Malicious PDF — malware analysis report

Static analysis result for SHA-256 29919020461255d7…

MALICIOUS

PDF

79.0 KB Created: 2021-04-07 10:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fce12ca7fae43579a5f9c49643fe66b3 SHA-1: 4cbe726c5820a8f6f98c6f52ba5a9adad4685e68 SHA-256: 29919020461255d705c1e0ce4ce0f41d2846af293dcea38db21042c345fb66e5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it's part of an SEO spam or phishing campaign. The embedded URLs and the document's structure point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://dugedepap.ru/123?utm_term=mmpi+questions+and+answers PDF link annotation
    • http://tuwukadinem.mygamesonline.org/scrivener_manual.pdfIn PDF document text
    • http://bitoxifa.sportsontheweb.net/89144885824.pdfIn PDF document text
    • http://libumuzu.22web.org/bodmas_rule_in_maths_examples.pdfIn PDF document text
    • https://rixexumig.weebly.com/uploads/1/3/2/6/132681576/dejepogo_pefibunarokub_setoz.pdfIn PDF document text
    • https://gasilarax.weebly.com/uploads/1/3/4/5/134595303/31065c089.pdfIn PDF document text
    • https://puguguduzi.weebly.com/uploads/1/3/0/7/130739618/vojibiz.pdfIn PDF document text
    • https://nukanomipixi.weebly.com/uploads/1/3/2/7/132740264/vojolofuwapusopu.pdfIn PDF document text
    • http://logazajosoba.iblogger.org/business_information_management_improving_performance_using_information_systems.pdfIn PDF document text
    • http://fuwiduwoxobol.mygamesonline.org/calculus_chain_rule_problems_and_solutions.pdfIn PDF document text
    • https://vifomamup.weebly.com/uploads/1/3/1/1/131163898/88133e1ca49.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/clasificacion_de_los_titulos_de_credito_en_guatemala.pdfIn PDF document text
    • https://cdn.sqhk.co/mitapupafono/hdib2ic/puppy_wallpaper_hd_zedge_iphone.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/luteloja.pdfIn PDF document text
    • https://luwutike.weebly.com/uploads/1/3/4/5/134518400/lunoge_sotugatigowixej_tibakugoxujodu.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/jUhe2jj/oneplus_5t_launcher_settings.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/lililis.pdfIn PDF document text
    • https://juxibawazorar.weebly.com/uploads/1/3/3/9/133997202/rinape-suzusuraza-motutuduwejona.pdfIn PDF document text
    • https://sovurides.weebly.com/uploads/1/3/5/3/135349611/bijafapiledazoguke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_d4f1657bc5344a4e84f7e322684e184b.pdf?index=trueIn PDF document text
    • http://lavofedelozus.rf.gd/12571737981.pdfIn PDF document text
    • https://6d0c6d30-55b9-4b7f-8145-34d11b484ddf.filesusr.com/ugd/8db56d_2e66c4ad52a94faf9155abd0ca899f90.pdf?index=trueIn PDF document text
    • http://gorenamuzenek.rf.gd/benny_andersson_chess.pdfIn PDF document text
    • http://sezisoj.rf.gd/aluminium_perforated_sheet_manufacturers_in_ahmedabad.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_off0000f662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF662 5296 bytes
SHA-256: 552017717acf46f16c22975b182bb78689a3351125630f37ab89f5855fb45452
font_01_sfnt_off00010868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10868 10716 bytes
SHA-256: e096e353be709cbf321cf5f219fc5753221e136b761d84fc91a01f3e6cea3482