Malicious PDF — malware analysis report

Static analysis result for SHA-256 11611ff80020dc9b…

MALICIOUS

PDF

76.4 KB Created: 2021-03-16 00:26:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d8faf8b1fbec617fe337083f6e9b1cbe SHA-1: a2d3a3239cb68b11823baed914762ce5d1eb12a7 SHA-256: 11611ff80020dc9b50dd5d1e7c705ffb4d5d1295e9e6192bf3aecbe8b3e86e77
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'ML_NYX_PDF_MALICIOUS' heuristics. The document body, though heavily obfuscated, appears to contain keywords related to pest control, likely serving as a lure. The presence of numerous links on disposable hosting further supports a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/strik?utm_term=gypsy+moth+caterpillar+treatment In PDF document text
    • http://housefashion.ru/kilufolokelimolibotz8cbz.pdfIn PDF document text
    • http://fionainthefield.org/36100806288dy1uc.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/fallout_4_miami_mod_download_pcegm1i.pdfIn PDF document text
    • http://zexawabezazojot.sportsontheweb.net/grama_sachivalayam_assistant_engineer_syllabus.pdfIn PDF document text
    • http://sidawiw.iblogger.org/texifu.pdfIn PDF document text
    • http://ru-order-687646765445.art/347084508495yygx.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/hw_j355_soundbar_review.pdfIn PDF document text
    • http://wavasupedip.22web.org/chrome_addons_video_helper.pdfIn PDF document text
    • https://labatozun.weebly.com/uploads/1/3/1/6/131607827/4760566.pdfIn PDF document text
    • http://xazapefunel.getenjoyment.net/79208397995.pdfIn PDF document text
    • https://fetesebi.weebly.com/uploads/1/3/4/8/134896421/maxidudovizep.pdfIn PDF document text
    • http://gooddevice-online.com/how_to_repair_a_frigidaire_affinity_dryer8k3se.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/bemixebiwirexesek.pdfIn PDF document text
    • http://genoray.pro/annamayya_movie_mp4uf4ay.pdfIn PDF document text
    • http://copyright-securityx.com/kujafikozifujukuserisuwovk85jb.pdfIn PDF document text
    • https://sanaxuruvumuvuk.weebly.com/uploads/1/3/1/4/131438582/widurud.pdfIn PDF document text
    • https://sebumowuvuxeluz.weebly.com/uploads/1/3/5/9/135962316/7003116.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/devuxuzejozam/is_your_capitalized_in_title_case.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/chinta_ta_chita_chita_video_gana.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/derecho_romano_gumesindo_libro.pdfIn PDF document text
    • http://bekokutiwafodi.epizy.com/ejercicios_de_identidades_trigonometricas_resueltos_paso_a_paso.pdfIn PDF document text
    • http://sexikiti.epizy.com/isometric_exercise_examples.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/pexanatigifoxumakeresom.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/musculos_multipenniformes_ejemplos.pdfIn PDF document text
    • http://rilokewatufev.rf.gd/52494521893.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_off0000ea3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3A 5304 bytes
SHA-256: f94b603abec81ecdd065790799dcfdf378eea5da1688222fa2671fb0df0000c9
font_01_sfnt_off0000fc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC28 12216 bytes
SHA-256: 8ef5362161313dfc34974c32a5e69b23104f1d8ef956326c16065505c70f07be