Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1d080155a7ec7c…

MALICIOUS

PDF

72.3 KB Created: 2021-03-04 12:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a5ad0d017778282829b9d4d7a8ab883b SHA-1: 51a921cde7a814c309a46526df89d6097543a3f3 SHA-256: 1e1d080155a7ec7ceb795a952df468571f0a02e1ad5f31f2e2a430ba71ba0083
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'Lotus car models 2020'. Numerous external URLs are embedded, with several pointing to disposable domains and potentially malicious content, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the link farm and potential malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=lotus+car+models+2020 PDF link annotation
    • http://martakkord.ru/kalowipuawsef.pdfIn PDF document text
    • http://czecheducation.space/jukumopowivepu98s3z.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/rowales.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/63066344065.pdfIn PDF document text
    • http://siondez.ru/98295249831913n6.pdfIn PDF document text
    • http://creditscoretracking.info/dometic_digital_thermostat_e1_error_code79oaz.pdfIn PDF document text
    • http://ketoxitigojaluk.sportsontheweb.net/tedadomonavaxikizunapupo.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/lixafoxijo.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/a_first_course_in_complex_analysis_with_applications_zill_solutions.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/gopro_hero4_black_edition_specifications.pdfIn PDF document text
    • http://idealica-ituficiale.website/g_shock_rangeman_battery_dead6atx0.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/feborobegibew/jugamavubidepigevixogi.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/westinghouse_55_inch_tv_remote_code.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/leicester_tigers_match_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/difafomakotuvorave.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_off0000e026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE026 5300 bytes
SHA-256: a76be924873d22598cc57683827e304c1148e25f999b45a97c3538a552d1b9d7
font_01_sfnt_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 10284 bytes
SHA-256: 09ad6741c21c84d1c659d6de129e534b4993e4c38e615e2e2cc08b4d1151540f

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